Answer:
3.5
Step-by-step explanation:
each jump will increase 3.5
order: 2 3 4 5 6 7
num: 5 8.5 12 15.8 19 22.5
sorry about the lines lol
the question is not visible lol
Brett is performing a hypothesis test in which the population mean is 310 and the standard deviation is 20. his sample data has a mean of 295 and a sample size of 50. which of the following correctly depicts the z-statistic for brett’s data? –5.30 –0.11 4.28 6.27
The z-statistic for Brett's data is found to be as given by: Option A: -5.30 (approx).
How to find the value of z-statistic for population mean?Suppose we're specified that:
The sample mean = [tex]\overline{x}[/tex]The population mean = [tex]\mu[/tex]The population standard deviation = [tex]\sigma[/tex]The sample size = nThen the z-statistic for this data is found as:
[tex]Z = \dfrac{\overline{x} - \mu}{\sigma/\sqrt{n}}[/tex]
For this case, we've got:
The sample mean = [tex]\overline{x}[/tex] = 295The population mean = [tex]\mu[/tex] = 310The population standard deviation = [tex]\sigma[/tex] = 20The sample size = n = 50Thus, we get:
[tex]Z = \dfrac{\overline{x} - \mu}{\sigma/\sqrt{n}} = \dfrac{295 - 310}{20/\sqrt{50}} \approx -5.30[/tex]
Thus, the z-statistic for Brett's data is found to be as given by: Option A: -5.30 (approx).
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According to the given data and applying it's formula, the z-statistic is of z = -5.30.
What is the z-statistic formula?It is given by:
[tex]z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
The parameters are:
[tex]\overline{x}[/tex] is the sample mean.[tex]\mu[/tex] is the value tested at the null hypothesis.[tex]\sigma[/tex] is the standard deviation of the population.n is the sample size.In this problem, the values of the parameters are given by:
[tex]\overline{x} = 295, \mu = 310, \sigma = 20, n = 50[/tex]
Hence, the z-statistic is given by:
[tex]z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{295 - 310}{\frac{20}{\sqrt{50}}}[/tex]
z = -5.30.
The z-statistic is of z = -5.30.
More can be learned about z-statistic at https://brainly.com/question/26454209
Juan and two of his friends are going to share of a pizza. How much will each person get?
(A) 2/3 of the pizza (B) 1/4 of the pizza (C) 1/3 of the pizza (D) 1/6 of the pizza
Answer:
[C] 1/3 of the pizza
Step-by-step explanation:
Given that:
Juan and two of his friends are going to share of a pizza.
Thus, we know that:
Juan + two of his friend = 3 people
Hence, each person gets
1/3 of the pizza
Check Answer
1/3 × 3 =1 whole {whole pizza}
or we can do
1/3 + 1/3 + 1/3 = 1 whole.
We can also do this:
Numerator = how many each person gets
Denominator = Total people
For more info about Numerator and Denominator:
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Kavinsky
Carmen is going to roll an 8-sided die 200 times. she predicts that she will roll a multiple of 4 twenty-five times. based on the theoretical probability, which best describes carmen’s prediction? carmen’s prediction is exact because 200 times startfraction 1 over 8 endfraction is 25. carmen’s prediction is low because 200 times one-fourth is 50. carmen’s prediction is low because 200 divided by 2 is 100. carmen’s prediction is high because 200 divided by 25 is 8.
The expected value is 50 then Carmen’s prediction is low because 200 times one-fourth is 50. Then the correct option is B.
How to calculate the expectation value?Expectation can be taken as a weighted mean, weights being the probability of occurrence of that specific observation.
Thus, if the random variable is X, and its probability mass function is given as
[tex]E(X) = \sum_{i=1}^n( f(x_i) \times x_i)[/tex]
(n is the number of values X takes)
Carmen is going to roll an 8-sided die 200 times.
She predicts that she will roll a multiple of 4 twenty-five times.
The sample will be
Total event = 8 {1, 2, 3, 4, 5, 6, 7, 8}
Then the favorable event will be to roll an 8-sided die and get a multiple of 4. Then we have
Favorable event = 2 {4, 8}
Then the probability will be
[tex]\rm P = \dfrac{2}{8} = \dfrac{1}{4}[/tex]
A dice is rolled 200 times, then by the binomial theorem we have the expected value will be
[tex]E(x) = nP = 200 \times \dfrac{1}{4} = 50[/tex]
More about the expectation link is given below.
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Answer:
B
Step-by-step explanation:
which of the following is an equations of the line passing through the points (-1,4) and (1,2)
Answer:
y = -1x + 3 or y = -x + 3 (**That is the last option which is D**)
Step-by-step explanation:
You need to do slope-intercept formula and the slope formula.
The Slope-Intercept Formula: y=mx+b
The Slope Formula: y2 - y1 / x2-x1
Your coordinates:
(-1,4) and (1,2)
2 - 4/1- (-1)
-2/2
Simplified is -1
Your "m" in the slope-intercept formula is -1
Formula: y=-1x + b
Now, you need to find the Y-Intercept which is the "b"
Using our slope-intercept formula, you need to plug in "x1" and "y1"
4 = -1(-1) + b
4 = 1 +b
4-1 = b
3 = b
So your equation is:
y = -1x + 3 or y = -x + 3
Which statements are true about the data sets? check all that apply. set a is symmetrical. set b has the same mean and median. set b is right skewed. set a is left skewed. the median of set a is larger than the mean of set a.
1) The mean of set A is larger than the mean of set B.
2)The median of set A is larger than the median of set B.
A = {10, 12, 12, 6, 8, 5, 4, 10, 8, 10, 12, 12, 6}
B = {8, 8, 8, 7, 9, 7, 9, 10, 6, 8}
What is the mean?Mean is the ratio of the sum to the total number of observations.
Mean of set A = 115/13
Mean of set B =80/10 =8
So, the mean of set A is larger than the mean of set B.
Arranging both the sets in ascending order
A = {4, 5, 6, 6, 8, 8, 10, 10, 10 12, 12, 12, 12 }
Median of set A = middle term = 7th term = 10
Similarly, the median of set B =8
So, the median of set A is larger than the median of set B.
Thus, 1) The mean of set A is larger than the mean of set B.
2)The median of set A is larger than the median of set B.
Answer:
B D E
Step-by-step explanation:
I took the assignment and these are right. :)
Dwayne used 12 centimeters of tape to wrap 6 presents. How much tape will Dwayne need in all if he has to wrap 9 presents?
Answer:
18cm
if it takes 12cm to wrap 6 presents, it means it takes 2cm to wrap one present.
9 individual presents will take 2 wraps, so Dwayne needs 18cm of wrapping paper.
Quadrilateral wxyz is a paralelogram if w=50
what is wzy
Find the surface area of the pyramid
Answer:
can u show a more clear picture or tell me the numbers on it
Find the value of x
please help!!!
Sum of the interior angles of any n-side shape must equals to :
[tex](n - 2) \times 180[/tex]
Thus ;
[tex](5 - 2) \times 180 = [/tex]
[tex] 3\times 180 = [/tex]
[tex]540 \: \: degrees[/tex]
So :
[tex]x + 122 + 100 + 90 + 144 = 540[/tex]
[tex]x +456 = 540[/tex]
Subtract both sides 456
[tex]x + 456 - 456 = 540 - 456[/tex]
[tex]x = 84[/tex]
There u go...
Have a great day ♡♡♡♡♡What is 1/6 x 1/7 x 588 = ???
Answer:
14
Step-by-step explanation:
Because I looked it up
Yvonne’s age, in years, is represented by y. Rebekah’s age is one year less than three times Yvonne’s age. What expression represents Rebekah’s age in years?
The expression that can be used to represent Rebekah's age in years given Yvonne's age is 3y - 1.
What expression represents Rebekah’s age?Mathematical expressions are statements that contain a combination of numbers and variables.
Given that Yvonne's age is y.
Rebekah's age = one less than 3 times y. 'less' means subtraction and 'times' means multiplication.
(3 x y) - 1
3y - 1
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The length of a rectangle is 3 less than 4 times
the width. The perimeter is 34. Find the length
and width.
Let
x = width
4x-3 = length
w=x
P = 2w + 2L
34 = 2x + 2(4x-3)
L=4x-3
→ Perimeter = 2( Length + Width)
→34 = 2x + 2(4x-3)
→34 = 2x + 8x - 6
→34 = 10x -6
→10x = 34 +6
→10 x = 40
→x = 40/10
→x = 4
Width is 4 unit and length is (4*4 -3) = 13 unit.Hope this helped you!
Write an equation for the line in point-slope and slope-intercept forms.
Passes through (3, 5) and has a slope of 5/3.
point-slope form: y-y₁ = m(x-x₁)
=============
[tex]\rightarrow \sf y - 5 = \dfrac{5}{3} (x-3)[/tex]
slope-intercept form: y = mx + b
============
[tex]\rightarrow \sf y - 5 = \dfrac{5}{3}(x)+ \dfrac{5}{3}(-3)[/tex]
[tex]\rightarrow \sf y - 5 = \dfrac{5}{3}(x)-5[/tex]
[tex]\rightarrow \sf y = \dfrac{5}{3}(x)-5+5[/tex]
[tex]\rightarrow \sf y = \dfrac{5}{3}(x)[/tex]
point slope form:-
y-y_1=m(x-x_1)y-5=5/3(x-3)3(y-5)=5(x-3)3y-15=5x-15Slope intercept form
y=mx+b
3y=5xy=5/3x+0Solve the system of equations! I will mark branliest!
Answer:
x = 16/3, y = -1/9
Step-by-step explanation:
4x + 1 = 5(x-3y) - 6
3(x+6y) + 4 = 9y + 19
Simplify both equations
4x + 1 = 5x-15y - 6
-x + 15y = -7
3x + 18y + 4 = 9y + 19
3x + 9y = 15
Now multiply 3 on both sides for the first equation.
(easier for adding both equations)
-3x + 45y = -21
3x + 9y = 15
Add both equations
x cancels out
54 y = -6
y = -1/9
plug in to other equation
3x + 9y = 15
3x - 1 = 15
3x = 16
x = 16/3
Click on the time that passed from start to end.
Pls help
Answer:
the answer is 28 minutes
What is the mean of the following set of numbers?
20, 14, 8, 28
20 + 14 + 8 + 28 = 70
70/4(we're dividing by 4 cause the no.of characters is 4)
and = 17.5
hope it really helps...!!!
Write the equation of the line that passes through the points (4,8) and
(1,8). Put your answer in fully reduced point-slope form, unless it is a
vertical or horizontal line.
Answer:
y=8
Step-by-step explanation:
vertical lines parallel to x axis
HELP PLSS HAHAHAHHAHA
help pls MATH IS HARD!!! :((
The y-intercept is the b term in slope intercept form (y = mx + b) or in the form of a point (0, y).
Function 1 is in slope-intercept form, and the b term is 5.
Function 2 is given in a table, but it is easy to find the point (0, y) and y is 5.25.
5.25 > 5
Function 2 has the greater y-intercept.
Hope this helps!
need some help with the question in the image
Cheers
Answer:
22%
Step-by-step explanation:
formula for percentage increase:
increase/original number x 100
increase is $66 (366-300)
66/300 x 100
= 22/100 x 100
= 22
hope this helped :)
Sam buys 6 pencils and 5 erasers for a total cost of $1. 60. Sally buys 3 pencils and 3
erasers for a total cost of $0. 90. How much does one ERASER cost?
Table 2. Hybrid Car Sales in the USA Year 2005- 205,828 Year 2007-352,852 Year 2012-432,798. By What percent did tje sales of hybrid cars increase from 2005 to 2012? Rnter your answer rounded to the nearest whole percent
The percentage increase in the sales of hybrid cars from 2005 to 2012 is 10%.
What are percentages?Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred. Percentages are a measure of frequency.
What is the increase in the percentage of hybrid cars?Percentage increase = (number of cars sold in 2012 / number of cars sold in2005)^(1/n) - 1
(432,798/ 205,828)^(1/8) - 1 = 10%
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And how far away is this value from the mean? _____ million
Answer:
Mean: (1.5+3.8+1.3+1.6+2.9+1.4+0.9+2.3+8.4+1.3)/10 = 2.54
Lowest Number: :: 2.54 - 0.9 = 1.64 million less than mean
Highest number: :: 8.4 - 2.54 = 5.86 million more than mean mean
You and Omar are talking about which two frozen treats would be best to sell. Omar claims that because 50% of the frozen treats sold in Week 1 were sundae cups, the sundae cups accounted for 50 % of the profit. Is Omar correct? Provide an explanation to justify your answer
Answer:
Step-by-step explanation:
He may or not be correct. It depends on the profit you make on each sundae cup compared with the profit on the other treat. The other treat might give a higher profit.
Omar is correct since if 50% of the
What is Profit?Profit is defined as the amount gained by a person or business.
Profit = Total Revenues - Total cost
Given that,
you and Omar are talking about which two frozen treats would be best to sell.
Omar claims that because 50% of the frozen treats sold in Week 1 were sundae cups, the sundae cups accounted for 50 % of the profit.
Total number of the frozen treats = 100%
If 50% of the frozen treats sold in Week 1 were sundae cups, then the profit of the frozen treats will be 50% of the total which came from sundae cups.
Hence Omar is correct.
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#SPJ2
What is the answer to this 3x+17=-2x-13???
Answer:
x = -6
Step-by-step explanation:
3x + 17 = -2x - 13
==> add 2x to both sides
5x + 17 = - 13
==> subtract 17 from both sides
5x = -30
==> divide both sides by 5
x = -6
For an art project, a cone is covered with paper without any gaps or overlaps. The height of the cone is 28 inches and its diameter is 14 inches.
What is the surface area of the covering to the nearest square inch?
The surface area of the covering of the cone to the nearest square inches is 788 inches²
Surface area of a conesurface area of a cone = πr(r + l)
where
r = radiusl = slant lengthTherefore,
diameter = 2(radius)
14 = 2r
r = 14 / 2
r = 7 inches
l² = 7² + 28²
l = √49 + 784
l = √833
l = 28.8617393793
l = 28.86 inches
Therefore,
surface area = 3.14 × 7 (7 + 28.86)
surface area = 21.98 × 35.86
surface area = 788.2028
surface area = 788 inches²
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Answer: Here you go :)
Step-by-step explanation:
Hope this helps, have a nice day!
Twelve is 14 more than an unknown number
Answer:
-2
Step-by-step explanation:
Since 12 is more
12 - 14
-2
Alvarez has $650 deposited into his bank account. The account earns simple interest of 5. 5% per year. No other money is added or withdrawn from the account for a period of four years. What is the total amount of money in the account after four years?
Answer:
$793
Step-by-step explanation:
The amount of money in an account earning simple interest is given by the formula ...
A = P(1 +rt)
where P is the principal invested at rate r for t years.
__
Using the values given in the problem statement, the account balance can be found to be ...
A = $650(1 +0.055×4) = $650×1.22 = $793
There will be $793 in the account after 4 years.
An empty container in the shape of a cube 6 inches deep is filled with plastic cubes.
How many plastic cubes measuring 1 inch across each face will it take to fill the container?
Enter your answer in the box.
Answer:
108
Step-by-step explanation: