Question 1

Find the mean.

Accepted Answer

13

Question 2

Find the equation of the regression line.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)    C

Question 3

The mean, also known as the arithmetic average, is found by .

Accepted Answer

adding the values of the data and dividing by the total number of values

Question 4

Based on data compiled by the World Health Organization, the mean systolic blood pressure in the
United States is 120, the standard deviation is 16, and the pressures are normally distributed. Find
The percent of individuals who have blood pressure between 120 and 128.

Accepted Answer

A) 15.9% 
B) 19.2% 
C) 22.7% 
D) 9.3% 
A) 15.9% 
B) 19.2% 
C) 22.7% 
D) 9.3%

Question 5

For the 8 test scores shown, which score corresponds to a percentile rank of 62.5?

Accepted Answer

The answer of For the 8 test scores shown, which...

Question 6

Find the mean, median, mode, and midrange for the data provided. The data shows hours spent at
Work for a group of men.

Accepted Answer

A) mean: 45, median: 46.575, mode: 45.5, midrange: 33.6 
B) mean: 46.575, median: 45, mode: no mode, midrange: 45.5 
C) mean: 45, median: 46.575, mode: 45, midrange: 33.6 
D) mean: 46.575, median: 45.5, mode: no mode, midrange: 45.5 
A) mean: 45, median: 46.575, mode: 45.5, midrange: 33.6 
B) mean: 46.575, median: 45, mode: no mode, midrange: 45.5 
C) mean: 45, median: 46.575, mode: 45, midrange: 33.6 
D) mean: 46.575, median: 45.5, mode: no mode, midrange: 45.5

Question 7

The GPAs of 20 students are given below. Construct a stem and leaf plot for the data using whole
numbers as stems and the decimals as leaves.

Accepted Answer

The answer of The GPAs of 20 students are given...

Question 8

Use a scatter plot to determine the relationship between the x values and the y values.

Accepted Answer

A) Nonlinear relationship 
B) No relationship 
C) Positive linear relationship 
D) Negative linear relationship 
A) Nonlinear relationship 
B) No relationship 
C) Positive linear relationship 
D) Negative linear relationship

Question 9

Suppose that you collect a very large number of maple tree seed pods, record their lengths and draw
A histogram of the data using narrow class widths. Next you collect a very large number of adult
Women's heights and again draw a histogram using narrow classes. How would you expect the two
Histograms to compare?

Accepted Answer

A) The heights histogram will be much wider since the mean value of the heights will be much larger than the mean of the pod lengths. 
B) Both should have similar shapes, approximating normal distributions. 
C) The heights histogram should be much taller since the heights will be much larger than the lengths of the seed pods. 
D) There is not enough information given to answer the question. 
A) The heights histogram will be much wider since the mean value of the heights will be much larger than the mean of the pod lengths. 
B) Both should have similar shapes, approximating normal distributions. 
C) The heights histogram should be much taller since the heights will be much larger than the lengths of the seed pods. 
D) There is not enough information given to answer the question.

Question 10

Find the range.

Accepted Answer

The answer of Find the range.  ...

Question 11

Find the value for r and test the significance of r at the 5% level and at the 1% level.

Accepted Answer

A) r = 0.998. r is significant at the 5% level and the 1% level 
B) r = 0.995. r is significant at the 5% level, but not at the 1% level 
C) r = 0.998. r is significant at the 5% level, but not at the 1% level 
D) r = 0.995. r is significant not significant at the 5% level or the 1% level 
A) r = 0.998. r is significant at the 5% level and the 1% level 
B) r = 0.995. r is significant at the 5% level, but not at the 1% level 
C) r = 0.998. r is significant at the 5% level, but not at the 1% level 
D) r = 0.995. r is significant not significant at the 5% level or the 1% level

Question 12

Find the mode.

Accepted Answer

Two modes:

Question 13

If a data value has a Z score of , then half of the data are below that value, and half are above.

Accepted Answer

The answer of If a data value has a Z...

Question 14

Find the equation of the regression line.

Accepted Answer

The answer of Find the equation of the regression line....

Question 15

If a student scored 1,484 on the SAT test which has a mean of 1,026 and a standard deviation of 210
and then scored 126 on an IQ test with a mean of 100 and a standard deviation of 15, determine
which test she did better on and explain your reasoning.

Accepted Answer

Her Z score on the SAT was abo

Question 16

A bookstore recorded the type of books 30 customers purchased during a weekend sale (R = romance novel, S
= science fiction, N = nonfiction, C = children's fiction). Construct a frequency distribution for the data.

Accepted Answer

The answer of A bookstore recorded the type of books...

Question 17

Find the variance and standard deviation.

Accepted Answer

variance =

Question 18

The frequency distribution below was obtained by monitoring the number of vacation days per year
taken by twenty-five employees. Construct a histogram and frequency polygon for the data.

Accepted Answer

The answer of The frequency distribution below was obtained by...

Question 19

Assume that males have a mean height of 69.1 in. with a standard deviation of 2.9 in., and females
Have a mean height of 63.7 in. with a standard deviation of 2.7 in. Based on Z scores, would a 5'6"
Male or a 5'2" female be taller compared to the rest of their gender?

Accepted Answer

A) female 
B) male 
A) female 
B) male

Question 20

The exam grades of 31 students were used to obtain the frequency distribution below. Construct a
frequency polygon for the data.

Accepted Answer

The answer of The exam grades of 31 students were...

Find the mean.

Find the equation of the regression line.

The mean, also known as the arithmetic average, is found by .

Based on data compiled by the World Health Organization, the mean systolic blood pressure in the United States is 120, the standard deviation is 16, and the pressures are normally distributed. Find The percent of individuals who have blood pressure between 120 and 128.

For the 8 test scores shown, which score corresponds to a percentile rank of 62.5?

Find the mean, median, mode, and midrange for the data provided. The data shows hours spent at Work for a group of men.

The GPAs of 20 students are given below. Construct a stem and leaf plot for the data using whole numbers as stems and the decimals as leaves.

Use a scatter plot to determine the relationship between the x values and the y values.

Find the range.

Find the value for r and test the significance of r at the 5% level and at the 1% level.

Find the mode.

If a data value has a Z score of , then half of the data are below that value, and half are above.

Find the equation of the regression line.

If a student scored 1,484 on the SAT test which has a mean of 1,026 and a standard deviation of 210 and then scored 126 on an IQ test with a mean of 100 and a standard deviation of 15, determine which test she did better on and explain your reasoning.

A bookstore recorded the type of books 30 customers purchased during a weekend sale (R = romance novel, S = science fiction, N = nonfiction, C = children's fiction). Construct a frequency distribution for the data.

Find the variance and standard deviation.

The frequency distribution below was obtained by monitoring the number of vacation days per year taken by twenty-five employees. Construct a histogram and frequency polygon for the data.

Assume that males have a mean height of 69.1 in. with a standard deviation of 2.9 in., and females Have a mean height of 63.7 in. with a standard deviation of 2.7 in. Based on Z scores, would a 5'6" Male or a 5'2" female be taller compared to the rest of their gender?

The exam grades of 31 students were used to obtain the frequency distribution below. Construct a frequency polygon for the data.

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Exam 11: Statistics

Find the mean.

Find the equation of the regression line.

The mean, also known as the arithmetic average, is found by .

Based on data compiled by the World Health Organization, the mean systolic blood pressure in the United States is 120, the standard deviation is 16, and the pressures are normally distributed. Find The percent of individuals who have blood pressure between 120 and 128.

For the 8 test scores shown, which score corresponds to a percentile rank of 62.5?

Find the mean, median, mode, and midrange for the data provided. The data shows hours spent at Work for a group of men.

The GPAs of 20 students are given below. Construct a stem and leaf plot for the data using whole numbers as stems and the decimals as leaves.

Use a scatter plot to determine the relationship between the x values and the y values.

Find the range.

Find the value for r and test the significance of r at the 5% level and at the 1% level.

Find the mode.

If a data value has a Z score of , then half of the data are below that value, and half are above.

Find the equation of the regression line.

If a student scored 1,484 on the SAT test which has a mean of 1,026 and a standard deviation of 210 and then scored 126 on an IQ test with a mean of 100 and a standard deviation of 15, determine which test she did better on and explain your reasoning.

A bookstore recorded the type of books 30 customers purchased during a weekend sale (R = romance novel, S = science fiction, N = nonfiction, C = children's fiction). Construct a frequency distribution for the data.

Find the variance and standard deviation.

The frequency distribution below was obtained by monitoring the number of vacation days per year taken by twenty-five employees. Construct a histogram and frequency polygon for the data.

Assume that males have a mean height of 69.1 in. with a standard deviation of 2.9 in., and females Have a mean height of 63.7 in. with a standard deviation of 2.7 in. Based on Z scores, would a 5'6" Male or a 5'2" female be taller compared to the rest of their gender?

The exam grades of 31 students were used to obtain the frequency distribution below. Construct a frequency polygon for the data.

Problem Solving

Sets

Logic

Numeration Systems

The Real Number System

Topics in Algebra

Consumer Mathematics

Measurement

Geometry

Probability and Counting Techniques

Voting Methods

Graph Theory

Available Online: Other Mathematical Systems

Filters