Question 1

In computing the mean of a sample, the value of ∑xi is divided by

Accepted Answer

A)  n. 
B)  n - 1. 
C)  n + 1. 
D)  n - 2. 
A)  n. 
B)  n - 1. 
C)  n + 1. 
D)  n - 2.

Question 2

The numerical value of the standard deviation can never be

Accepted Answer

A)  larger than the variance. 
B)  zero. 
C)  negative. 
D)  smaller than the variance. 
A)  larger than the variance. 
B)  zero. 
C)  negative. 
D)  smaller than the variance.

Question 3

Given the following information:​   The mean would then be

Accepted Answer

A)  12.5. 
B)  8. 
C)  0.64. 
D)  1.25. 
A)  12.5. 
B)  8. 
C)  0.64. 
D)  1.25.

Question 4

Which of the following is not a measure of central location?

Accepted Answer

A)  Mean 
B)  Median 
C)  Standard deviation 
D)  Mode 
A)  Mean 
B)  Median 
C)  Standard deviation 
D)  Mode

Question 5

The closing stock price of MNM Corporation for the last 7 trading days is shown below.   ​ The variance is

Accepted Answer

A)  2.828. 
B)  2.618. 
C)  8. 
D)  6.857. 
A)  2.828. 
B)  2.618. 
C)  8. 
D)  6.857.

Question 6

From a population of size 400, a random sample of 40 items is selected.The median of the sample

Accepted Answer

A)  must be 200, since 400 divided by 2 is 200. 
B)  must be 10, since 400 divided by 40 is 10. 
C)  must be equal to the median of population, if the sample is truly random. 
D)  none of these alternatives is correct. 
A)  must be 200, since 400 divided by 2 is 200. 
B)  must be 10, since 400 divided by 40 is 10. 
C)  must be equal to the median of population, if the sample is truly random. 
D)  none of these alternatives is correct.

Question 7

​If the data distribution is symmetric, the skewness is

Accepted Answer

A)  ​0. 
B)  ​.5. 
C)  ​1. 
D)  ​positive. 
A)  ​0. 
B)  ​.5. 
C)  ​1. 
D)  ​positive.

Question 8

​The most frequently occurring value of a data set is called the

Accepted Answer

A)  ​mean. 
B)  ​median. 
C)  ​mode. 
D)  ​outlier. 
A)  ​mean. 
B)  ​median. 
C)  ​mode. 
D)  ​outlier.

Question 9

The Michael Painting Company has purchased paint from several suppliers.The purchase price per gallon and the number of gallons purchased are shown below.   Compute the weighted average price per gallon.

Accepted Answer

The answer of The Michael Painting Company has purchased paint...

Question 10

​Which of the following statements about financial growth factors using the geometric mean is untrue?

Accepted Answer

A)  ​The growth factor cannot be less than zero. 
B)  ​A growth factor less than 1 indicates negative growth. 
C)  ​A growth factor greater than 2 indicates more than 100 percent growth. 
D)  ​A growth factor greater than 0 indicates positive growth. 
A)  ​The growth factor cannot be less than zero. 
B)  ​A growth factor less than 1 indicates negative growth. 
C)  ​A growth factor greater than 2 indicates more than 100 percent growth. 
D)  ​A growth factor greater than 0 indicates positive growth.

Question 11

A group of students had dinner at a local restaurant.The total bill for the dinner was $364.99.Each student paid his/her equal share of the bill, which was $21.47.How many student's were at the dinner?

Accepted Answer

A)  124 
B)  365 
C)  17 
D)  22 
A)  124 
B)  365 
C)  17 
D)  22

Question 12

​In a box plot, data value x is considered an outlier if

Accepted Answer

A)  ​x  Q3 + 1.0(IQR). 
B)  ​x  Q2 + 1.0(IQR). 
C)  ​x  Q3 + 1.5(IQR). 
D)  ​x  Q2 + 1.5(IQR). 
A)  ​x  Q3 + 1.0(IQR). 
B)  ​x  Q2 + 1.0(IQR). 
C)  ​x  Q3 + 1.5(IQR). 
D)  ​x  Q2 + 1.5(IQR).

Question 13

From a population of size 500, a random sample of 50 items is selected.The mode of the sample

Accepted Answer

A)  must be 500. 
B)  must be equal to the mode of population, if the sample is truly random. 
C)  must be equal to the mean of the population, if the sample is truly random. 
D)  can be larger, smaller or equal to the mode of the population. 
A)  must be 500. 
B)  must be equal to the mode of population, if the sample is truly random. 
C)  must be equal to the mean of the population, if the sample is truly random. 
D)  can be larger, smaller or equal to the mode of the population.

Question 14

When a percentage of the smallest and largest values are deleted from a data set, the mean of the remaining data values is the _____ mean.

Accepted Answer

A)  geometric 
B)  weighted 
C)  trimmed 
D)  interquartile 
A)  geometric 
B)  weighted 
C)  trimmed 
D)  interquartile

Question 15

Growth factors for the population of Atlanta in the past five years have been 1, 2, 3, 4 , and 5.The geometric mean is

Accepted Answer

A)  15. 
B)    . 
C)    . 
D)    . 
A)  15. 
B)    . 
C)    . 
D)    .

Question 16

The variance of a sample was reported to be 81.The report indicated that   = 972.What is the sample size?

Accepted Answer

The answer of The variance of a sample was reported...

Question 17

The following frequency distribution shows the starting salaries (in $1,000s) of a sample of business students:   For the above data, compute the mean starting salary: (Give your answer in dollars.)

Accepted Answer

The answer of The following frequency distribution shows the starting...

Question 18

Functionality in interactive data dashboards that allows the user to access information and analyze at an increasingly detailed level is referred to as

Accepted Answer

A)  drilling down. 
B)  transformation. 
C)  root-cause analysis. 
D)  data trimming. 
A)  drilling down. 
B)  transformation. 
C)  root-cause analysis. 
D)  data trimming.

Question 19

​Statements about the proportion of data values that must be within a specified number of standard deviations of the mean can be made using

Accepted Answer

A)  ​Chebyshev's theorem. 
B)  The empirical rule. 
C)  ​A five-number summary. 
D)  Percentiles. 
A)  ​Chebyshev's theorem. 
B)  The empirical rule. 
C)  ​A five-number summary. 
D)  Percentiles.

Question 20

The 50th percentile is the

Accepted Answer

A)  mode. 
B)  median. 
C)  mean. 
D)  midrange. 
A)  mode. 
B)  median. 
C)  mean. 
D)  midrange.

In computing the mean of a sample, the value of ∑x_i is divided by

The numerical value of the standard deviation can never be

Given the following information: The mean would then be

Which of the following is not a measure of central location?

The closing stock price of MNM Corporation for the last 7 trading days is shown below. The variance is

From a population of size 400, a random sample of 40 items is selected.The median of the sample

If the data distribution is symmetric, the skewness is

The most frequently occurring value of a data set is called the

The Michael Painting Company has purchased paint from several suppliers.The purchase price per gallon and the number of gallons purchased are shown below. Compute the weighted average price per gallon.

Which of the following statements about financial growth factors using the geometric mean is untrue?

A group of students had dinner at a local restaurant.The total bill for the dinner was $364.99.Each student paid his/her equal share of the bill, which was $21.47.How many student's were at the dinner?

In a box plot, data value x is considered an outlier if

From a population of size 500, a random sample of 50 items is selected.The mode of the sample

When a percentage of the smallest and largest values are deleted from a data set, the mean of the remaining data values is the _____ mean.

Growth factors for the population of Atlanta in the past five years have been 1, 2, 3, 4 , and 5.The geometric mean is

The variance of a sample was reported to be 81.The report indicated that = 972.What is the sample size?

The following frequency distribution shows the starting salaries (in $1,000s) of a sample of business students: For the above data, compute the mean starting salary: (Give your answer in dollars.)

Functionality in interactive data dashboards that allows the user to access information and analyze at an increasingly detailed level is referred to as

Statements about the proportion of data values that must be within a specified number of standard deviations of the mean can be made using

The 50th percentile is the

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 3: Descriptive Statistics: Numerical Measures

In computing the mean of a sample, the value of ∑xi is divided by

The numerical value of the standard deviation can never be

Given the following information:​ The mean would then be

Which of the following is not a measure of central location?

The closing stock price of MNM Corporation for the last 7 trading days is shown below. ​ The variance is

From a population of size 400, a random sample of 40 items is selected.The median of the sample

​If the data distribution is symmetric, the skewness is

​The most frequently occurring value of a data set is called the

The Michael Painting Company has purchased paint from several suppliers.The purchase price per gallon and the number of gallons purchased are shown below. Compute the weighted average price per gallon.

​Which of the following statements about financial growth factors using the geometric mean is untrue?

A group of students had dinner at a local restaurant.The total bill for the dinner was $364.99.Each student paid his/her equal share of the bill, which was $21.47.How many student's were at the dinner?

​In a box plot, data value x is considered an outlier if

From a population of size 500, a random sample of 50 items is selected.The mode of the sample

When a percentage of the smallest and largest values are deleted from a data set, the mean of the remaining data values is the _____ mean.

Growth factors for the population of Atlanta in the past five years have been 1, 2, 3, 4 , and 5.The geometric mean is

The variance of a sample was reported to be 81.The report indicated that = 972.What is the sample size?

The following frequency distribution shows the starting salaries (in $1,000s) of a sample of business students: For the above data, compute the mean starting salary: (Give your answer in dollars.)

Functionality in interactive data dashboards that allows the user to access information and analyze at an increasingly detailed level is referred to as

​Statements about the proportion of data values that must be within a specified number of standard deviations of the mean can be made using

The 50th percentile is the

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

In computing the mean of a sample, the value of ∑x_i is divided by

Given the following information: The mean would then be

The closing stock price of MNM Corporation for the last 7 trading days is shown below. The variance is

If the data distribution is symmetric, the skewness is

The most frequently occurring value of a data set is called the

Which of the following statements about financial growth factors using the geometric mean is untrue?

In a box plot, data value x is considered an outlier if

Statements about the proportion of data values that must be within a specified number of standard deviations of the mean can be made using