given a sample of four electricians, what is the standard deviation for the sampling distribution of the sample mean?

After answering the provided question, we can conclude that Therefore, the solutions for the equation are b ≈ -1.973 and b ≈ 1.973.

An equation in mathematics is a statement that states the equality of two expressions. An equation is made up of two sides that are separated by an algebraic equation (=). For example, the argument "2x + 3 = 9" asserts that the phrase "2x + 3" equals the value "9". The purpose of equation solving is to determine the value or values of the variable(s) that will allow the equation to be true. Equations can be simple or complicated, regular or nonlinear, and include one or more elements. The variable x is raised to the second power in the equation "x2 + 2x - 3 = 0." Lines are utilised in many different areas of mathematics, such as algebra, calculus, and geometry.

Starting with the given equation:

[tex]2b^4 - 13 = 73\\2b^4 = 86\\b^4 = 43\\b = (43)^(1/4)\\b =1.973\\b = -1.973, 1.973\\[/tex]

Therefore, the solutions for the equation are b ≈ -1.973 and b ≈ 1.973.

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Answer:

a) 11:09
b) 31 minutes it should take to arrive at newtown

Step-by-step explanation:

a) you have to read the table
b) you need to know how many minutes are in an hour and for 11:38 to 12 is 22 minutes and you need an extra 9 so add them both together which will give the answer of 31 minutes.

Without more information and statistical analysis, it is difficult to determine whether the data provide convincing evidence that the average GRE verbal reasoning score has changed since 2004.

To determine whether the average GRE verbal reasoning score has changed since 2004, we would need to conduct a hypothesis test. We could set up a null hypothesis that the population mean for the verbal reasoning score has not changed since 2004, and an alternative hypothesis that the population mean has increased.

Assuming a normal distribution of scores, we could use a two-sample t-test to compare the means of the two populations (scores from 2004-2007 and scores from 2011). We would need to collect a random sample of scores from both time periods and calculate the sample means and standard deviations.

Without knowing the sample size or standard deviation of the 2011 scores, it is difficult to determine whether the difference in average scores is statistically significant. However, if the sample sizes are large enough and the difference in means is significant, then we could conclude that there is convincing evidence that the average GRE verbal reasoning score has changed since 2004.

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Using multiplication principle of counting, Argyle can make 140 different outfits.

Argyle has 10 T-shirts and 7 pairs of shorts, which he can wear with either sandals or sneakers. To find out how many different outfits he can make, we can use the multiplication principle of counting, which states that the total number of outcomes for a sequence of events is the product of the number of outcomes for each event.

First, we need to determine the number of ways Argyle can choose a T-shirt and a pair of shorts. He can choose one of 10 T-shirts and one of 7 pairs of shorts, giving us:

10 x 7 = 70

Next, we need to determine the number of ways Argyle can choose shoes. For each outfit, he can choose either sandals or sneakers, giving us:

shoes = 2

Finally, we can find the total number of different outfits by multiplying the number of ways to choose a T-shirt and shorts by the number of ways to choose shoes:

70 x 2 = 140

Therefore, Argyle can make 140 different outfits if all the colors and patterns coordinate.

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The value of x in the equation (x - m)/ (n + m) = (x - n)/ (n - m) when solved is x = n²/m.

A list of the elements that make up an equation includes coefficients, variables, operators, constants, terms, and the equal to sign. An equation must always begin with the "=" sign and have terms on both sides. Each party should be treated equally.

Each side of an equation does not need to have a lot of terms, operators, and variables. Each equation with variables is an algebraic equation.

In the question, equation given:

(x - m)/ (n + m) = (x - n)/ (n - m)

Apply cross multiplication:

⇒ (x - m) (n - m) = (n + m) (x - n)

After opening the brackets, we have:

⇒ xn - xm - mn + n² = xn + xm - n² - mn

Evaluating the like terms in the equation we get:

⇒ 2xm = 2n²

So, we have

⇒ xm = n²

Divide by m on both sides:

x = n²/m

Therefore, the solution of the equation is x = n²/m.

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Answer:

[tex] 1\frac{299}{475} [/tex]

Step-by-step explanation:

[tex] \frac{2.58 \times 1.2 \times {10}^{ - 5} }{1.9 \times {10}^{ - 5} } = \frac{2.58 \times 1.2}{1.9} = \frac{3.096}{1.9} = \frac{774}{475} = 1\frac{299}{475} [/tex]

Answer:

Step-by-step explanation:

(2.58) (1.2×10^-5)/1.9×10^-5​;

=(2.58) (1.2×[tex]\frac{1}{10^{5} }[/tex])/1.9×[tex]\frac{1}{10^{5} }[/tex];

=(2.58)([tex]\frac{1.2}{100000}[/tex])/1.9×[tex]\frac{1}{100000}[/tex];

=0.000031/1.9×[tex]\frac{1}{100000}[/tex];

=0.0000163×[tex]\frac{1}{100000}[/tex];

=0.000000000163;

=1.63×10^-10

Answer:

The cylinder is better to buy because it can hold more.

Step-by-step explanation:

If the heights of a cone and a cylinder are equal, then the volume of the cylinder is three times as much as the volume of a cone. Cylinder has a greater volume.

Example:

let's say you have a container. one shaped as a cylinder and one as a cone. both of them have a height of 1. Which one do you think will hold more?

the cylinder will hold more because of its shape and volume.

I hope this helps

hang in there ;)

Answer:

x>5

Step-by-step explanation:

11x+2> 57

11x>55

x>5

Answer:

x>5

Step-by-step explanation:

11x + 2 > 57

      -2     -2

11x > 55

divide both sides by 11, the 11's cancel and

x > 5

The meaning of a 95% confidence interval for a population mean is to select an interval where when the process is repeated for many different samples, approximately 95% of the intervals would contain the sample mean and when the process is repeated for many different samples, approximately 95% of the intervals would contain the population mean. These two are the correct options from the given choices.

A confidence interval is a range of values, constructed from a sample, that is expected to include the value of an unknown population parameter with a specific level of certainty.

Confidence intervals are typically used to indicate the precision and accuracy of an estimate, rather than the probability of an event occurring.

Therefore, in the context of this question, we can say that a 95% confidence interval for a population mean would select an interval where when the process is repeated for many different samples, approximately 95% of the intervals would contain the sample mean and when the process is repeated for many different samples, approximately 95% of the intervals would contain the population mean.

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Answer:

Step-by-step explanation:

Quantity   US Customary FL oz. UK (Imperial)  US Nutrition labeling

960 ml         32,46 FL oz.           33,79 FL oz.            32,00 FL oz.

Which means 960 milli liter is equal to 32,46 FL oz.

This one is relatively simple. Once you know how much liquid a liter contains, you just need to divide it by a conversion factor equal to 1000. The result is 1 ml. That's what "mili" means - 1/1000th. If you have 1000 ml, it's actually 1 liter.

For this page, we are talking about fluid ounces (FL oz.). We're not talking about ounces, which are used to measure solids like metals. The fluid phone (fl Oz) is only for measuring the volume of liquids.

The problem is that you first need to know what fluid you are using. If you're a US citizen, you probably use US customary fluid ounces (US fl oz.).

As you can see, the numbers you need to divide 960 can be very impractical and unwieldy. Typing those long strings of numbers can be tedious. But you can also round them off to get a result that isn't too far off from a more accurate calculation.

For US v oz, divide volume in ml by 29.58 to get v oz.

So, 960ml equals 32.46oz when rounded up.

For amounts in milliliters on US food labels, divide the amount in milliliters by 30 to get the US fluid ounce equivalent. Similarly, you divide 960 by 30 to get 32.00 fluid ounces (fl oz).

For UK (Imperial) fluid ounces, divide 960 ml by 28.41 to get 33.79 UK fluid ounces.

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The Central Limit Theorem justifies the use of the normal distribution for the sampling distribution of proportion.

The Central Limit Theorem states that under certain conditions, the sampling distribution of the mean of a random sample drawn from any population will be approximately normal, regardless of the shape of the population distribution. One of these conditions is that the sample size should be large enough, typically n >= 30.  For the sampling distribution of proportion, the Central Limit Theorem applies because the proportion is essentially a mean of a sample of binary data of a normal distribution  (e.g. success or failure). If the sample size is large enough, the sampling distribution of the proportion will be approximately normal, regardless of the shape of the population distribution.  The condition np >= 5 and nq >= 5 is used to ensure that the sample size is large enough for the normal approximation to be valid. In essence, this condition ensures that there are enough successes and failures in the sample to satisfy the conditions of the Central Limit Theorem. If this condition is not met, then the normal approximation may not be valid and alternative methods, such as the binomial distribution, should be used instead.

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I think they are vertical angles.

Hope this helps

Answer: To make one bracelet, Maura needs 25 beads and 20 centimeters of elastic cord.

If Maura bought a pack of 1,000 beads, she can make:

1,000 beads ÷ 25 beads per bracelet = 40 bracelets

To make 40 bracelets, she will need:

40 bracelets × 20 centimeters of elastic cord per bracelet = 800 centimeters of elastic cord

To convert centimeters to meters, we divide by 100:

800 centimeters ÷ 100 centimeters per meter = 8 meters

Therefore, Maura should buy 8 meters of elastic cord to make 40 bracelets with a pack of 1,000 beads.

Step-by-step explanation:

Answer:

suiiiii

Step-by-step explanation:

The solution of p-5>7 can be represented on a number line.We start by adding 5 to both sides of the inequality:p - 5 + 5 > 7 + 5p > 12This means that any value of p that is greater than 12 would satisfy the inequality.On a number line, we would represent this by shading the region to the right of 12, since any number to the right of 12 is greater than 12.

The graph of the solution to the system of inequalities is added as an attachment

Given that

x + y ≥ 6

8x + 16y ≤ 160

To graph the solution to a system of inequalities, follow these steps:

See attachment for the system of inequalities

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The area of the floor of the hall is 96 square meters.

A rectangular prism is simply a three-dimensional solid shape which has six faces that are rectangles.

The volume of a rectangular prism is expressed as;

V = w × h × l

Where w is the width, h is height and l is length.

Given that, the length of a hall is three times and width is two times of its height.

Let the height of the hall be h.

Then the length = 3h and width = 2h

Volume of the hall = Length ×  Width × Height

384 = (3h) × (2h) × (h)

384 = 6h³

6h³ = 384

Divide both sides by 6

h³ = 64

Take the cube roots

h = ∛64

h = 4

Hence;

Length = 3h = 12

Width = 2h = 8

Area of the floor = Length x Width

Area of the floor = 12 × 8

Area of the floor = 96 square meters.

Therefore, the area is 96 square meters.

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y = 26.4

Given: 3y + 7y - 84 = 180

First, we should combine any value that is similar.

3y + 7y - 84 = 180

10y - 84 = 180

Next, we will substitute.

10y - 84 + 84 = 180 = 84

10y = 264

Now we will divide by the value before the variable.

[tex]\frac{10y = 264}{ 10}[/tex] = y = 26. 4

Lastly, we will plug in the values.

3(26.4) + 7(26.4)- 84 = 180

76.2 + 184.8 - 84 = 180

264 - 84 = 180

180 = 180 ✓

The position of the diver in relation to the surface of the water 8 minutes after beginning to rise can be calculated as follows:

The diver was at a depth of 80 feet below the surface initially. After 8 minutes of rising, the diver has come up to the surface by 3 x 8 = 24 feet. So, the diver's position in relation to the surface of the water is:

80 - 24 = 56 feet below the surface.

Therefore, the integer that describes the position of the diver in relation to the surface of the water 8 minutes after beginning to rise is A. -56.

For given circle, the length of arc ST and RPT are 13.44 ft and 50.8 ft respectively.

What exactly is a circle?

A circle is a geometric object made up of all the points on a plane that are equidistant from the centre. A circle, in other terms, is a collection of points that are all the same distance from a centre point. This distance is known as the circle's radius.

The circumference of a circle is the distance around the outside of the circle, and it can be calculated using the formula C = 2πr, where π (pi) is a mathematical constant and r = radius of the circle.

Now,

For given circle

radius=14 ft

then

circumference=2*π*r=2*22/7*14

=88 ft

angle for the arc ST=180-125

=55°

then length of arc ST=55/360*88

=13.44 ft

and angle of arc RPT=180-97+125

=208°

then length of arc RPT=208/360*88

=50.8 ft

Hence,

             the length of arc ST and RPT are 13.44 ft and 50.8 ft respectively.

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The required average speed of the given train is 42 km/hour.

Speed is what it means. the speed at which an object's location changes in any direction.

The distance traveled in relation to the time it took to travel that distance is how speed is defined.

As speed simply has a direction and no magnitude, it is a scalar quantity.

So, we have:

63/x + 72/6+x = 3

63(x+6)+72x/x(x+6) = 3

63x + 378 + 72x/x²+6x = 3

378 + 135x = 3x² = 18x

3x² - 117x - 378 = 0

x² - 39x - 126 = 0

x² - 42x + 3x - 126 = 0

x(x-42)+3(x-42) = 0

(x+3)(x-42) = 0

x = 42, -3

As speed cannot be zero, the first average speed is 42 km per hour.

Therefore, the required average speed of the given train is 42 km/hour.

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Correct question:

A train travels at a certain average speed for a distance 63 km and then travels a distance of 72 km at an average speed of 6 km/hr more than the original speed. If it takes 3 hours to complete total journey, what is its original average speed?

This scale is commonly referred to as 1/90.56.

A model of the Eiffel Tower at the same scale as the model of the Burj Khalifa would be 11.7 inches tall.

A model is a simplified version of reality that can help explain the workings of a complex system.

The actual height of the Burj Khalifa is 2,717 feet (828 metres).

To determine the scale of the model, we must divide the actual height by the model height:

Scale = (Actual Height)/(Model Height)

= (2,717 feet)/(30 inches)

= 90.56 feet/inch

This scale is commonly referred to as 1/90.56.

To calculate the height of a model of the Eiffel Tower, we must multiply the actual height of the tower (1,063 feet) by the scale:

Model Height = (Actual Height) x (Scale)

= (1,063 feet) x (1/90.56)

= 11.7 inches

Therefore, a model of the Eiffel Tower at the same scale as the model of the Burj Khalifa would be 11.7 inches tall.

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Answer:

a. {-2, -1, 0, 1, 2, 3, 4}

b. {-2, -1, 0, 1, 2, 3}

Answer:

r = 4.3

Step-by-step explanation:

10r + 6 = 49

subtract 6 from both sides:

10r = 43

divide both sides by 10:

r = 4.3

Answer:

R=4.3 or 43/10

Step-by-step explanation:

10r + 6 - 6 = 49 - 6  subtract 6 from each side of equation

10r = 43

10r/10 = 43/10 divide each side by 10

r = 43/10 or 4.3 or 4 3/10 as mixed number

The graph of the given piecewise functions will open towards for all.

What exactly is a piecewise function?

A piecewise function is a mathematical function that is defined by different expressions or formulas over different intervals or "pieces" of the domain. In other words, a piecewise function is defined by multiple "pieces" or "cases," each of which is defined over a different interval of the domain. The domain of the function is partitioned into intervals, and each interval has its own expression or formula that describes the function's behavior over that interval. The different pieces of the function are typically joined together at the boundaries of the intervals to create a continuous function overall.

Now,

Graph of f(x)=|3x| (y=|3x|):

The graph of g(x) = f(x) - 2 (y=|3x|-2) is obtained by shifting the graph of f(x) downward by 2 units. Therefore, the graph of g(x) is:

The graph of h(x) = f(x-4  )(y=|3x|-4) is obtained by shifting the graph of f(x) to the right by 4 units. Therefore, the graph of h(x) is:

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It should be noted that the provided assertion indicates that (A) is 41° (b) is -17.16 (a) is 5.41

Having three sides, three angles, and three points, a triangular is a closed, two-dimensional object.

We know that a right angle is , and we are given another angle that is , so that means that angle  is:

A + 49 +90 = 180

A + 139 = 180

A = 180 - 139

A = 41°

To find side length b, we can use the sin function:

sin(49) = b/18

18 ×-0.53 = b

b = -17.16

To find side length a, we can use the cos function:

cos(49) = a/18

18 × 0.300 = a

a = 5.41

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Using a significance level of 0.05, we found a statistically significant difference in the number of rounds played by day of the week.

To determine if the test statistic is significant, we need to compare it to a critical value from an F-distribution table.

The critical value is based on the degrees of freedom, which is calculated as follows: df between = k - 1 (where k is the number of groups being compared, in this case 5) and df within = N - k (where N is the total sample size, in this case 5).

Using these values, we can find the critical value from the F-distribution table to be 2.866.

Comparing this critical value to our calculated test statistic of 3.60, we can see that the test statistic exceeds the critical value.

This means that we can reject the null hypothesis and conclude that there is a statistically significant difference in the number of rounds played by day of the week at the 0.05 significance level.

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Numbers 2, 3, and 4  are the following are linear factors of p(x).

What does a linear equation mean in mathematics?

A linear equation is one that only has a constant and a first-order (linear) component, like y=mx+b, where m is the slope and b is the y-intercept.

Occasionally, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.

                                     The term "linear equation" refers to equations with power 1 variables. Where ax+b = 0 is one example with only one variable, where a and b are real numbers and x is the variable.

We can know the answer to this by letting p(x) be equal to zero and by substituting the values of x to the function.

   p(x) = x3 - 2x2 - 5x + 6

To know what to substitute, we equate all factors to zero since even if only one of these factors is zero, the product of all factors would immediately be zero.

        1 . x + 1 = 0  ; x = -1

        2.  x + 2 = 0  ; x = -2

        3. x - 1  = 0  ; x = 1

         4.  x - 3 = 0 ; x = 3

We then try to substitute each value of x to the original polynomial and see if it will equal to zero.

1. (-1)³ - 2(-1)² - 5(-1)  + 6  = 8 ≠ 0

2. (-2)³ - 2(-2)² - 5(-2) + 6 = 0

3. (1)³  - 2(1)² - 5(1) + 6 = 0

4. (3)³ - 2(3)² - 5(3) + 6 = 0

As we can see, all but number 1 equated to zero therefore numbers 2, 3, and 4 are all linear factors of p(x).

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If one-tower can hold 4.37×10⁶ gallons of water and other tower can hold 3.92×10⁶ gallons of water, then combined water capacity of two towers is 8.29×10⁶ gallons.

In order to find the combined water capacity of the two towers, we simply need to add their individual capacities.

The water capacity of one tower is = 4.37×10⁶ gallons of water, and the water capacity of other tower is = 3.92×10⁶ gallons of water,

So, their combined capacity is:

⇒ 4.37×10⁶ + 3.92×10⁶ = 8.29×10⁶ gallons

Therefore, the combined water capacity of the two towers is 8.29×10⁶ gallons.

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The given question is incomplete, the complete question is

A city has two water towers. one tower holds 4.37×10⁶ gallons of water and the other holds 3.92×10⁶ gallons of water. What is the combined water capacity of the two towers?

The intercepts of x- axis is (0, 0) (6,0) and y - axes is (0,0)

The x-intercept is the point on the x-axis that is the shortest distance from the origin to the point where the line cuts the x-axis, and the y-intercept is the point on the y-axis that is the shortest distance from the origin to the point where the line cuts the y-axis. Both of these are referred to as the origin.

The polynomial function is :

f(x) = [tex]x^3-12x^2+36x[/tex]

[tex]x^3-12x^{2} +36x=0[/tex]   [x intercepts]

[tex]x(x^{2} -12x+36)=0[/tex]

[tex]x(x - 6)^2=0[/tex]  [=> x = 0   x = 6]

x = 0 [y intercepts]

x = 0 [=> y = 0]

=> (0, 0) (6,0) [Interception point with x -axis]

=> (0, 0) [Interception point with y- axis]

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