Question 1

​From a population of size 1,000, a random sample of 100 items is selected.The mean of the sample

Accepted Answer

A)  ​must be 10 times smaller than the mean of the population. 
B)  ​must be equal to the mean of the population, if the sample is truly random. 
C)  ​must be 10 times larger than the mean of the population. 
D)  ​can be larger, smaller or equal to the mean of the population. 
A)  ​must be 10 times smaller than the mean of the population. 
B)  ​must be equal to the mean of the population, if the sample is truly random. 
C)  ​must be 10 times larger than the mean of the population. 
D)  ​can be larger, smaller or equal to the mean of the population.

Question 2

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

Accepted Answer

A)  24. 
B)  25. 
C)  26. 
D)  27. 
A)  24. 
B)  25. 
C)  26. 
D)  27.

Question 3

The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84.The grade point average of students at UTK is 2.4 with a standard deviation of 0.84.Which university shows a more dispersed grade distribution?

Accepted Answer

UTK's coefficient of variation

Question 4

The geometric mean of 1, 2, 4, and 6 is

Accepted Answer

A)  6.93. 
B)  2.63. 
C)  1.90. 
D)  3.61. 
A)  6.93. 
B)  2.63. 
C)  1.90. 
D)  3.61.

Question 5

The coefficient of correlation

Accepted Answer

A)  is the same as the coefficient of determination. 
B)  cannot be larger than 100. 
C)  cannot be larger than 1. 
D)  cannot be negative. 
A)  is the same as the coefficient of determination. 
B)  cannot be larger than 100. 
C)  cannot be larger than 1. 
D)  cannot be negative.

Question 6

​The __________ can be interpreted as the number of standard deviations a data value is from the mean of all the data values.

Accepted Answer

A)  ​skewness 
B)  ​coefficient of variation 
C)  ​z-score 
D)  ​correlation coefficient 
A)  ​skewness 
B)  ​coefficient of variation 
C)  ​z-score 
D)  ​correlation coefficient

Question 7

If the coefficient of variation is 40% and the mean is 70, then the variance is

Accepted Answer

A)  28. 
B)  2800. 
C)  1.75. 
D)  784. 
A)  28. 
B)  2800. 
C)  1.75. 
D)  784.

Question 8

The geometric mean of 3, 4, 6 is

Accepted Answer

A)  2.35. 
B)  3.61. 
C)  4.16. 
D)  8.48. 
A)  2.35. 
B)  3.61. 
C)  4.16. 
D)  8.48.

Question 9

The measure of dispersion which is not measured in the same units as the original data is the

Accepted Answer

A)  median. 
B)  standard deviation. 
C)  coefficient of determination. 
D)  variance. 
A)  median. 
B)  standard deviation. 
C)  coefficient of determination. 
D)  variance.

Question 10

Which of the following symbols represents the size of the sample?

Accepted Answer

A)  σ2 
B)  σ 
C)  N 
D)  n 
A)  σ2 
B)  σ 
C)  N 
D)  n

Question 11

The symbol σ2 is used to represent the

Accepted Answer

A)  variance of the population. 
B)  standard deviation of the sample. 
C)  standard deviation of the population. 
D)  variance of the sample. 
A)  variance of the population. 
B)  standard deviation of the sample. 
C)  standard deviation of the population. 
D)  variance of the sample.

Question 12

When the data are skewed to the right, the measure of Skewness will be

Accepted Answer

A)  negative. 
B)  zero. 
C)  positive. 
D)  one. 
A)  negative. 
B)  zero. 
C)  positive. 
D)  one.

Question 13

​The hourly wages of a sample of 130 system analysts are given below. ​   ​
The coefficient of variation equals
​

Accepted Answer

A)  ​0.30%. 
B)  ​30%. 
C)  ​5.4%. 
D)  ​54%. 
A)  ​0.30%. 
B)  ​30%. 
C)  ​5.4%. 
D)  ​54%.

Question 14

The nth root of the product of the n observations is the

Accepted Answer

A)  weighted mean. 
B)  geometric mean. 
C)  product deviation. 
D)  product variance. 
A)  weighted mean. 
B)  geometric mean. 
C)  product deviation. 
D)  product variance.

Question 15

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

Accepted Answer

A)  24. 
B)  25. 
C)  26. 
D)  27. 
A)  24. 
B)  25. 
C)  26. 
D)  27.

Question 16

The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated.   The coefficient of variation equals

Accepted Answer

A)  0.1125%. 
B)  11.25%. 
C)  203.12%. 
D)  0.20312%. 
A)  0.1125%. 
B)  11.25%. 
C)  203.12%. 
D)  0.20312%.

Question 17

In a five number summary, which of the following is not used for data summarization?

Accepted Answer

A)  The smallest value 
B)  The largest value 
C)  The mean 
D)  The median 
A)  The smallest value 
B)  The largest value 
C)  The mean 
D)  The median

Question 18

The sum of deviations of the individual data elements from their mean is

Accepted Answer

A)  always greater than zero. 
B)  always less than zero. 
C)  sometimes greater than and sometimes less than zero, depending on the data elements. 
D)  always equal to zero. 
A)  always greater than zero. 
B)  always less than zero. 
C)  sometimes greater than and sometimes less than zero, depending on the data elements. 
D)  always equal to zero.

Question 19

The difference between the largest and the smallest data values is the

Accepted Answer

A)  variance. 
B)  interquartile range. 
C)  range. 
D)  coefficient of variation. 
A)  variance. 
B)  interquartile range. 
C)  range. 
D)  coefficient of variation.

Question 20

Growth factors for the population of Chattanooga in the past two years have been 8 and 12.The geometric mean has a value of

Accepted Answer

A)  20. 
B)    . 
C)    . 
D)  96. 
A)  20. 
B)    . 
C)    . 
D)  96.

From a population of size 1,000, a random sample of 100 items is selected.The mean of the sample

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

The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84.The grade point average of students at UTK is 2.4 with a standard deviation of 0.84.Which university shows a more dispersed grade distribution?

The geometric mean of 1, 2, 4, and 6 is

The coefficient of correlation

The __________ can be interpreted as the number of standard deviations a data value is from the mean of all the data values.

If the coefficient of variation is 40% and the mean is 70, then the variance is

The geometric mean of 3, 4, 6 is

The measure of dispersion which is not measured in the same units as the original data is the

Which of the following symbols represents the size of the sample?

The symbol σ² is used to represent the

When the data are skewed to the right, the measure of Skewness will be

The hourly wages of a sample of 130 system analysts are given below. The coefficient of variation equals

The nth root of the product of the n observations is the

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

The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. The coefficient of variation equals

In a five number summary, which of the following is not used for data summarization?

The sum of deviations of the individual data elements from their mean is

The difference between the largest and the smallest data values is the

Growth factors for the population of Chattanooga in the past two years have been 8 and 12.The geometric mean has a value of

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

​From a population of size 1,000, a random sample of 100 items is selected.The mean of the sample

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

The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84.The grade point average of students at UTK is 2.4 with a standard deviation of 0.84.Which university shows a more dispersed grade distribution?

The geometric mean of 1, 2, 4, and 6 is

The coefficient of correlation

​The __________ can be interpreted as the number of standard deviations a data value is from the mean of all the data values.

If the coefficient of variation is 40% and the mean is 70, then the variance is

The geometric mean of 3, 4, 6 is

The measure of dispersion which is not measured in the same units as the original data is the

Which of the following symbols represents the size of the sample?

The symbol σ2 is used to represent the

When the data are skewed to the right, the measure of Skewness will be

​The hourly wages of a sample of 130 system analysts are given below. ​ ​ The coefficient of variation equals ​

The nth root of the product of the n observations is the

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

The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. The coefficient of variation equals

In a five number summary, which of the following is not used for data summarization?

The sum of deviations of the individual data elements from their mean is

The difference between the largest and the smallest data values is the

Growth factors for the population of Chattanooga in the past two years have been 8 and 12.The geometric mean has a value of

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

From a population of size 1,000, a random sample of 100 items is selected.The mean of the sample

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

The __________ can be interpreted as the number of standard deviations a data value is from the mean of all the data values.

The symbol σ² is used to represent the

The hourly wages of a sample of 130 system analysts are given below. The coefficient of variation equals

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