The value that measures the difference between a sample mean and the population mean on average is the standard error of the mean (SEM).
The value that measures the difference expected, on average, between a sample mean and the population mean is the standard error of the mean (SEM). The SEM is a measure of the variability of sample means around the true population mean, and it quantifies the precision of the sample mean as an estimate of the population mean. In general, the larger the sample size, the smaller the SEM, indicating that larger samples are more likely to provide a more accurate estimate of the population mean.
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Complete question:
when a random sample is selected from a population, the sample mean is not expected to be exactly equal to the population mean. what value measures the difference expected, on average, between a sample mean and the population mean? group of answer choices
A) the standard error
B) the expected value
C) the mean of the population
D) the standard deviation of the population
The diagram shows a circle with centre O.
Write an expression in terms of x and/or y for
a) angle OAC.
b) angle OBA.
The expression in terms of x and/or y for
a) angle OAC = y
b) angle OBA = 2x
Give a brief account on circle.A circle is a shape consisting of all points in the plane that are at a specified distance from a specified point (center). Correspondingly, it is a curve drawn by points moving in the plane at a constant distance from a point. The distance from any point of the circle to the center is called the radius. Normally the radius should be a positive number.
Specifically, a circle is a simple closed curve that divides a plane into two regions inside and outside. In everyday use, the term "circle" can be used interchangeably to refer to the entire shape, including the boundary or interior of the shape. In strict technical usage the circle is just the boundary and the whole figure is called the disk.
In ΔOCA;
OC = OA [Radius of circle]
So, m∠OCA = m∠OAC
y = m∠OCA
y = m∠OAC
Similarly in ΔAOB;
m∠OAB = 2x
m∠OAB = m∠OBA
2x = m∠OBA
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The complete question is as follows:
The diagram shows a circle with centre O.
Write an expression in terms of x and/or y for
a) angle OAC.
b) angle OBA.
A Bike is discounted at 30% off. The original price is $250.
What is the sales price?
Answer:
Step-by-step explanation:
75
Answer:$75
Step-by-step explanation:
Write an equation for the nth term of each geometric sequence.
-1, -5, -25,...
Oa. an = (5)-¹-1
Ob. a , = - 1¹( 3 ) - ²
5
Oc. an =-1(5)n-1
Od. an = 1(5)n-1
Answer:
C
Step-by-step explanation:
the nth term of a geometric sequence is
[tex]a_{n}[/tex] = a₁ [tex]r^{n-1}[/tex]
where a₁ is the first term and r the common ratio
here a₁ = - 1 and r = [tex]\frac{a_{2} }{a_{1} }[/tex] = [tex]\frac{-5}{-1}[/tex] = 5
then nth term is
[tex]a_{n}[/tex] = - 1 [tex](5)^{n-1}[/tex]
The function f(x) = log_2(x) is transformed 2 units up and vertically compressed by a factor of 0.4 to become g(x) Which function represents the transformation g(x) ?
The transformation of the function f(x) = log2(x) involves shifting 2 units up and vertically compressing by a factor of 0.4.
Which function represents the transformation g(x)?
The following equation can be used to represent the transformation:
g(x) = 0.4*log2(x) + 2
Therefore, the function that represents the transformation g(x) is:
g(x) = 0.4*log2(x) + 2
To understand the transformation of the function f(x) = log2(x) into g(x), we need to first understand the individual transformations involved.
Vertical compression: When a function is vertically compressed by a factor 'a', its output values get multiplied by 'a'. This means that the function's range gets compressed by a factor of 'a'. In this case, the function f(x) = log2(x) is vertically compressed by a factor of 0.4. So, the output values of f(x) get multiplied by 0.4, which compresses the range of the function by a factor of 0.4.
Vertical shift: When a function is shifted 'b' units up or down, its output values get increased or decreased by 'b'. This means that the function's range gets shifted up or down by 'b'. In this case, the function f(x) = log2(x) is shifted 2 units up. So, the output values of f(x) get increased by 2, which shifts the range of the function 2 units up.
Putting these two transformations together, we get the transformation of the function f(x) = log2(x) into g(x) as follows:
g(x) = 0.4*log2(x) + 2
This equation represents a vertical compression of the function f(x) by a factor of 0.4, followed by a vertical shift of 2 units up.
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Complete question:
what is the value of w 10(w+3)=70
HELP ME PLEASE
find the area of a regular pentagon with a side length of 10 and apothem of 6.9.
Round to the nearest tenth
Answer:
172.5
Step-by-step explanation:
1/2(perimeter)(Apothem)
10+10+10+10+10=50
1/2(50)(6.9)
172.5
how to convert 54.6% to a fraction
Answer:
273/500
Step-by-step explanation:
54.6% can be changed into a fraction by making it over 100.
This gives us 54.6/100
However, you can change it by making it into an integer by multiplying both sides by 10.
This gives us 546/1000
You can then go on by simplifying this by dividing both sides by 2
273/500.
Hope this helped,
No problem
in class, 30% of students study hindi, 45% study maths, and 15% study both hindi and maths. if a student is randomly selected, what is the probability that he/she study hindi or maths?
The probability that a randomly selected student studies Hindi or Maths is 0.60 or 60%.
We can use the formula P(A or B) = P(A) + P(B) - P(A and B) to find the probability that a randomly selected student studies Hindi or Maths is calculated by adding the probabilities of studying Hindi and Maths and subtracting the probability of studying both Hindi and Maths.
P(Hindi or Maths) = P(Hindi) + P(Maths) - P(Hindi and Maths)
P(Hindi or Maths) = 0.30 + 0.45 - 0.15
P(Hindi or Maths) = 0.60
Therefore, if a student is selected randomly, then the probability that he/she studies Maths or Hindi is 0.60 or 60%.
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GEOMETRY PLS HELP ASAP
Therefore, the length of LM is 85.5.
What is length?Length is a measure of the size or extent of an object or a distance between two points. It refers to the longest dimension of an object or the distance between two points in space, typically measured in units such as inches, centimeters, meters, or miles. In mathematics, length is also used to describe the size of a line segment or a curve, which can be measured using various techniques such as Euclidean distance, arc length, or fractal dimension. Length is an important concept in many fields, including physics, engineering, geometry, and statistics.
Since LM is the midsegment of ABCD, it is parallel to both AB and DC, and its length is equal to the average of the lengths of AB and DC.
The length of LM can be found using the formula:
[tex]LM = (AB + DC) / 2[/tex]
Substituting the given values, we get:
[tex]LM = (46 + 125) / 2[/tex]
[tex]LM = 171 / 2[/tex]
[tex]LM = 85.5[/tex]
Therefore, the length of LM is 85.5.
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How could you justify the answers from the video by graphing the solution to the inequality x – 4 < 15 on a number line?
By graphing the solution to the inequality x - 4 < 15 on a number line. The graph demonstrates that any number less than 19 satisfies the given inequality, allowing you to quickly verify the solution set.
To justify the answers from the video by graphing the solution to the inequality x - 4 < 15 on a number line, follow these steps:
1. Start by isolating the variable, x. To do this, add 4 to both sides of the inequality: x - 4 + 4 < 15 + 4, which simplifies to x < 19.
2. Now, you need to represent the inequality x < 19 on a number line. Begin by drawing a horizontal line and marking it with evenly spaced points. Label each point with consecutive integers, ensuring that 19 is among them.
3. Since the inequality is "less than" (x < 19) and not "less than or equal to," place an open circle at 19 on the number line. An open circle indicates that 19 is not included in the solution set.
4. To show that the solution consists of all values less than 19, draw an arrow starting from the open circle at 19 and extending to the left. This visually represents all the numbers that are smaller than 19.
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A box contains 7 plain pencils and 1 pen. A second box contains 3 color pencils and 3 crayons. One item from
each box is chosen at random. What is the probability that a pen from the first box and a crayon from the
second box are selected?
Write your answer as a fraction in simplest form.
The probability of selecting a pen from the first box is 1/8 (since there is only 1 pen out of 8 items in the box). The probability of selecting a crayon from the second box is 3/6 (since there are 3 crayons out of 6 items in the box).
To find the probability of both events happening together, we multiply the probabilities:
P(pen and crayon) = P(pen) x P(crayon)
P(pen and crayon) = (1/8) x (3/6)
Simplifying the fraction 3/6 to 1/2:
P(pen and crayon) = (1/8) x (1/2)
Multiplying the numerators and denominators:
P(pen and crayon) = 1/16
Therefore, the probability of selecting a pen from the first box and a crayon from the second box is 1/16.
what is the value of 3x+5y (algebric notation)
The answer of the given question based on Algebric notation is when x=4 and y=2, the value of 3x + 5y is 22.
What is Expression?An expression is combination of numbers, variables, and mathematical operations like addition, subtraction, multiplication, division, exponentiation, and others. Expressions can be simple or complex, and they can be used to represent a wide range of mathematical concepts, such as equations, inequalities, functions, and formulas. For example, "3x + 5y" is an expression that involves the variables x and y, and the operations of multiplication and addition.
In algebra, expressions are often used to represent relationships between variables, and to solve problems by manipulating the expressions to obtain a desired result.
To find the value of 3x + 5y when x=4 and y=2, we simply substitute these values into the expression and evaluate:
3x + 5y = 3(4) + 5(2) = 12 + 10 = 22
Therefore, when x=4 and y=2, the value of 3x + 5y is 22.
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The complete question is :Find 3x + 5y when x=4 and y=2 (algebric notation)?
Given: -6x < 36. Choose the solution set. {x | x < 6} {x | x > 6} {x | x < -6} {x | x > -6}
To solve the inequality -6x < 36, we need to isolate x on one side of the inequality sign. We can do this by dividing both sides of the inequality by -6, remembering to reverse the inequality sign because we are dividing by a negative number:
-6x < 36
x > -6
Therefore, the solution set for the inequality is {x | x > -6}.
PLEASE HELP I AM BEGGING
Answer: The answer should be A, Isosceles
Step-by-step explanation: Have a great day!
Find the standard form of the equation of the circle with center (-1,4) and tangent to the line
y = 2.
The standard form of the equation of this circle is _____
Please help!!
We want a circle that has center (-1,4) and just skims y=2. We can find the equation of the circle knowing its center and its radius. Knowing that it skims y=2 the radius=4-2=2 (Do you know why? Think visually). Then, the standard form of a circle is given by (x-h)^2+(y-k)^2=r^2 where (h,k) is the center and r is the radius. So the equation is (x+1)^2+(y-4)^2=4
4. Find the surface area of the net below.
7 m
7 m
5 m
Answer:
238
Step-by-step explanation:
Formula: 2(aXb + bXc + cXa)
let, a = 7 m
b = 7 m
c = 5 m
then,
2(7X7 +7X5 + 7X5)
= 2(49 + 35 + 35)
= 2 X 119
= 238
Eric can do 70 sit-ups in 2 minutes. John can do 108 sit-ups in 3 minutes. Do these rates forma proportion?
Answer: To check if the rates form a proportion, we need to calculate the rate (sit-ups per minute) for both Eric and John.
Eric's rate: 70 sit-ups / 2 minutes = 35 sit-ups per minute
John's rate: 108 sit-ups / 3 minutes = 36 sit-ups per minute
Now we can set up the proportion:
35/1 = 36/1
The rates do not form a proportion since they are not equal.
Step-by-step explanation:
- Find area of a rectangle if the length is
represented by 8x³y² and the width is
represented by 3x²yº.
Answer:
The area of the rectangle is 24x^5 y^2.
Step-by-step explanation:
To find the area of a rectangle when the length is represented by 8x³y² and the width is represented by 3x²yº, you need to multiply the length by the width.
8x³y² represents the length and 3x²yº represents the width.
Therefore, the area (A) of the rectangle can be calculated as:
A = length x width
A = 8x³y² x 3x²yº
To simplify this expression, you can use the laws of exponents:
A = 8x³y² x 3x²y°
A = 8 x 3 x x³ x x² x y² x yº
A = 24x^(3+2) y^(2+0)
Simplifying further:
A = 24x^5 y^2
Therefore, the area of the rectangle is 24x^5 y^2.
Answer:
I'm going to make it more simple for you so you don't have to read his book (no offence to that guy)
the area of the rectangle is 24x^5 y^2.
5. Using complete sentences, describe how the variable h and the variable k of the general formula for a cube root function effects the graph. The general formula is
y=a³√√x-h+k
Answer: The variables h and k in the general formula for a cube root function affect the graph by causing a horizontal and vertical shift, respectively. The value of h determines the horizontal position of the graph by shifting it to the right or left along the x-axis. If h is positive, the graph will shift to the right, and if h is negative, the graph will shift to the left. On the other hand, the value of k determines the vertical position of the graph by shifting it up or down along the y-axis. If k is positive, the graph will shift upward, and if k is negative, the graph will shift downward. It is important to note that these shifts do not affect the shape of the graph, only its position on the coordinate plane. Therefore, changing the values of h and k in the general formula for a cube root function will cause the graph to shift, but the overall shape of the graph will remain the same.
Step-by-step explanation:
What is the value of x?
Enter your answer in the box.
x =
Answer: x = 8
Step-by-step explanation:
x^2 + y^2 = c^2
x^2 + 6^2 = 10^2
x^2 + 36 = 100
100 - 36 = x^2
x^2 = 64
x = root 64
x = 8
In the figure, the vertices of are ( 0, 6 ), ( 8, 0 )and ( 5, 8 ). If ⊥ , then find
the length of altitude �
Santiago got the board game Andromeda Aliens for his birthday. The game comes with a purple weighted die that is given as a reward to a player who captures an alien spaceship. To see how the die is weighted, Santiago rolls it 30 times and records the results.
Number Times rolled
1 8
2 4
3 3
4 9
5 2
6 4
Based on the data, what is the probability that the next roll of this die is a 4?
Based on the data given, the probability of the next roll of the die being a 4 is 30%.
what is probability?
Probability is a measure of the likelihood of an event occurring. It is a number between 0 and 1, where 0 means the event is impossible and 1 means the event is certain to happen. The probability of an event can be calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
To find the probability of rolling a 4 on the next roll, we need to divide the number of times 4 was rolled by the total number of rolls. In this case, 4 was rolled 9 times out of a total of 30 rolls.
So the probability of rolling a 4 on the next roll is:
9/30 = 3/10 = 0.3 = 30%
Therefore, based on the data given, the probability of the next roll of the die being a 4 is 30%.
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Please help and explain
Answer: See attachment (enlarge line)
Step-by-step explanation:
y = 2x
When x = -1
y = 2(-1)
y = -2
When x = 2
y = 2(2)
y = 4
Plot the points on the graph (-1, -2) and (2, 4)
33/16 as a decimal rounded
The answer is 2.0625
Answer:
33/16=2.0625
Step-by-step explanation:
33/16=2 rounded to the nearest integer
33/16=2.1 rounded to 1 decimal place
33/16=2.06 rounded to 2 decimal places
33/16=2.063 rounded to 3 decimal places
33/16=2.0625 rounded to 4 decimal places
Are these triangles similar, congruent or neither? What theorem supports your answer?
options:
Similar: AA
Similar: SAS
Similar: SSS
Congruent: HL
Congruent: ASA
Congruent: AAS
Neither
Answer:
These triangles are congruent by AAS.
How do you solve this?
What i the answer this is a geometry homework?
Answer: 21
In order to find the answer you have to multiply FJ and JH which is equal to 6x+24.
After, multiply GJ and JE which is equal to 90.
After doing all these steps equal your findings:
6x+24= 90
x= 11
The length of FH is asked so, you have found x, which is equal to 11
FH= 6+(11+4)= 21
find the domain in inequalities
The domain of the expression is (−∞,−5)∪(−5,7)∪(7,∞).
What is the domain?The range of values that we are permitted to enter into our function is known as the domain of a function. The x values for a function like f make up this set (x). A function's range is the collection of values it can take as input.
Here the given expression is,
=> [tex]\frac{3}{x+5}-\frac{1}{7-x}[/tex]
Now simplifying the expression then,
=> [tex]\frac{3(7-x)-1(x+5)}{(x+5)(7-x)}[/tex]
=> [tex]\frac{21-3x-x-5}{7x-x^2+35-5x}[/tex]
=> [tex]\frac{-4x-26}{-x^2+2x+35}[/tex]
Now to find domain then x≠-5 and x≠7.
The domain is (−∞,−5)∪(−5,7)∪(7,∞).
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an article marked at rs.8,000 is sold at rs6689.60 allowing some discount and adding vat.8f the rate of discount was double then the rate of vat, find the selling price of the article without vat
the rate of discount is double the rate of VAT. The selling price of the article without VAT is Rs. [tex]7,680.[/tex]
What is the selling price?Let's assume that the original selling price of the article is Rs. [tex]8,000.[/tex]
Let the rate of discount be x and the rate of VAT be y.
We know that the selling price of the article with discount and VAT is Rs. [tex]6,689.60.[/tex]
So, we can write the following equation:
Selling price = (Original price - Discount) + VAT
[tex]Rs. 6,689.60 = (Rs. 8,000 - Rs. 8,000 x (x/100)) + (Rs. 8,000 - Rs. 8,000 x (x/100)) x (y/100)[/tex]
Simplifying the equation, we get:
[tex]Rs. 6,689.60 = Rs. 8,000 (1 - x/100 + y/100 - xy/10000)[/tex]
Now, we are given that the rate of discount is double the rate of VAT. So, we can write:
[tex]x = 2y[/tex]
Substituting this value in the equation above, we get:
[tex]Rs. 6,689.60 = Rs. 8,000 (1 - 3y/100 + 2y^2/10000)[/tex]
Simplifying this equation further, we get a quadratic equation in y:
[tex]2y^2 - 3y + 0.41505 = 0[/tex]
Solving this quadratic equation using the quadratic formula, we get:
[tex]y = 10.5 or y = 0.01988[/tex]
Since the rate of VAT cannot be 10.5%, we will take y = 0.01988 (approx. 2%).
Now, we can calculate the rate of discount using x = 2y:
x = 4%
So, the selling price of the article without VAT can be calculated as follows:
Selling price without VAT = Original price - Discount
[tex]= Rs. 8,000 - Rs. 8,000 x\times (4/100)[/tex]
[tex]= Rs. 7,680[/tex]
Therefore, the selling price of the article without VAT is Rs. [tex]7,680.[/tex]
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x-4=16+3x. I need the answer hurry PLEASE!!!!
Answer:
x = -10
Step-by-step explanation:
To solve the equation:
x - 4 = 16 + 3x
Collect like terms:
x - 3x = 16 + 4
Then solve:
-2x = 20
x = -10
Answer: x is -10
Step-by-step explanation:
x - 4 = 16+3x
Transposing the x, and arranging in one side of equation
x - 3x = 16 + 4
now we changed the positions of x and we can simplify it.
so,
x - 3x = -2x -----------------(1)
16 + 4 = 20 ----------------(2)
Therefore the x - 3x = 16 + 4 will change into -2x = 20
Then x = 20 ÷ -2 = -10
x = -10