Question 1

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

Accepted Answer

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

Question 2

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 3

The following data show the yearly salaries of a sample of EMBA graduates. $$\begin{array}{l}
\text { EMBA Student }&\text {Salary (in } \$ 1,000 \text { ) }\
\mathrm { A } & 88 \
\mathrm {~B} & 97 \
\mathrm { C } & 90 \
\mathrm { D } & 110 \
\mathrm { E } & 114 \
\mathrm {~F} & 98 \
\mathrm { G } & 92 \
\mathrm { H } & 95
\end{array}$$ ​ 
a.
Compute the mean yearly salary and give your answer in dollars.
b.
Compute the standard deviation and give your answer in dollars.
c.
Compute the 75th percentile and give your answer in dollars. Fully explain what the value that you have determined indicates.

Accepted Answer

a.
$98,000
b.
$9,355

Question 4

A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. $$\begin{array} { l c } 
\text { Unpaid Balance } & \text { Frequency } \
10 - 29 & 1 \
30 - 49 & 6 \
50 - 69 & 9 \
70 - 89 & 11 \
90 - 109 & 13
\end{array}$$ ​ 
a.
Determine the mean unpaid balance.
b.
Determine the variance.
c.
Determine the standard deviation.
d.
Compute the coefficient of variation.

Accepted Answer

a.
74
b.
5

Question 5

The following data show the yearly salaries of football coaches at some state supported universities. $\begin{array}{ll}
\text { Univer sity } & \text { Salary } \
 & \text { (in } \mathbf{1 , 0 0 0}) \
\mathrm{A} & 44 \
\mathrm{C} & 68 \
\mathrm{D} & 47 \
\text { E } & 62 \
\mathrm{~F} & 59 \
\mathrm{G} & 53 \
\mathrm{H} & 94
\end{array}$ For the above sample, determine the following measures. 
a.
The mean yearly salary
b.
The standard deviation
c.
The mode
d.
The median
e.
The 70th percentile

Accepted Answer

​
a.
60
b.

Question 6

The population change between 2000 and 2010 for several small cities are shown below. $$\begin{array}{l}
&\text { Population Change }\
\text { City } & \text { (number of residents) } \
\text { Chattanooga } & 3083 \
\text { Collegedale } & 1466 \
\text { East Ridge } & - 461 \
\text { Lakeside } & 1113 \
\text { Ridgeside } & - 11 \
\text { Signal Mountain } & 395 \
\text { Soddy-Daisy } & 3290 \
\text { Walden } & 437
\end{array}$$ For the above sample, determine the following measures. 
a.
The mean
b.
The standard deviation
c.
The median

Accepted Answer

a.
1,164
b

Question 7

In a statistics class, the average grade on the final examination was 75 with a standard deviation of 5.Use Chebyshev's theorem to answer the following questions.
​
a.
At least what percentage of the students received grades between 50 and 100?
b.
Determine an interval for the grades that will be true for at least 70% of the students. (Hint: First, compute the Z-score.)

Accepted Answer

a.
96%
b.

Question 8

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20.In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40.In which state do the wages of cashiers appear to be more dispersed?

Accepted Answer

The coefficient of variation i

Question 9

Below you are given a sample of ACT scores of 12 college applicants. $\begin{array} { l l } 19&23&27&21&32&17&20&29&22&30&25&15 \end{array}$
 ​ 
a.
Determine the first quartile.
b.
Determine the 75th percentile.
c.
Determine the interquartile range.

Accepted Answer

a.
19.25
b

Question 10

The following is the frequency distribution for the speed of a sample of automobiles traveling on an interstate highway. $$\begin{array} { c c } 
\text { Speed } ( m p h ) & \text { Frequency } \
50 - 54 & 2 \
55 - 59 & 4 \
60 - 64 & 5 \
65 - 69 & 10 \
70 - 74 & 9 \
75 - 79 & \underline { 5 } \
& 35
\end{array}$$ The standard deviation is

Accepted Answer

A)  6.969. 
B)  7.071. 
C)  48.570. 
D)  50.000. 
A)  6.969. 
B)  7.071. 
C)  48.570. 
D)  50.000.

Question 11

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)  $\sqrt { 15 }$ . 
C)  $\sqrt { 120 }$ . 
D)  $\sqrt [ 5 ] { 120 }$ . 
A)  15. 
B)  $\sqrt { 15 }$ . 
C)  $\sqrt { 120 }$ . 
D)  $\sqrt [ 5 ] { 120 }$ .

Question 12

A researcher has collected the following sample data. $$\begin{array} { r r r r r } 
5 & 12 & 6 & 8 & 5 \
6 & 7 & 5 & 12 & 4
\end{array}$$ The 75th percentile is

Accepted Answer

A)  7. 
B)  7.5. 
C)  8. 
D)  9. 
A)  7. 
B)  7.5. 
C)  8. 
D)  9.

Question 13

​For data skewed to the left, the skewness is

Accepted Answer

A)  ​less than .5. 
B)  ​less than 1. 
C)  ​less than the mean. 
D)  ​negative. 
A)  ​less than .5. 
B)  ​less than 1. 
C)  ​less than the mean. 
D)  ​negative.

Question 14

When n-1 is used in the denominator to compute variance,

Accepted Answer

A)  the data set is a sample. 
B)  the data set is a population. 
C)  the data set could be either a sample or a population. 
D)  the data set is from a census. 
A)  the data set is a sample. 
B)  the data set is a population. 
C)  the data set could be either a sample or a population. 
D)  the data set is from a census.

Question 15

The following is a frequency distribution for the ages of a sample of employees at a local company. $$\begin{array}{l}
\text { Age } &\text { Frequency }\
30 - 39 & 2 \
40 - 49 & 3 \
50 - 59 & 7 \
60 - 69 & 5 \
70 - 79 & 1
\end{array}$$ ​ 
a.
Determine the average age for the sample.
b.
Compute the variance.
c.
Compute the standard deviation.
d.
Compute the coefficient of variation.

Accepted Answer

a.
54.5
b.

Question 16

The yearly incomes of the top highest paying professions in the United States are shown below. $\begin{array}{lc}
\text { Profession } & \text { Yearly Income } \
\text { Surgeons } & (\text { in } \$ 1,000) \
\text { Obstetricians } & 136 \
\text { Anesthesiologists } & 132 \
\text { Internists } & 130 \
\text { Pediatricians } & 116 \
\text { Psychiatrists } & 114 \
\text { Dentists } & 110 \
\text { General Practitioners } & 110 \
\text { Chief Executives } & 107 \
\text { Airline Pilots } & 99
\end{array}$ For the above sample, determine the following measures (Give your answer in dollars). 
a.
The mean yearly salary
b.
The standard deviation
c.
The median
d.
The mode

Accepted Answer

a.
$118,00

Question 17

μ is an example of a​

Accepted Answer

A)  ​population parameter. 
B)  ​sample statistic. 
C)  ​population variance. 
D)  ​mode. 
A)  ​population parameter. 
B)  ​sample statistic. 
C)  ​population variance. 
D)  ​mode.

Question 18

​An unusually small or unusually large data value is called

Accepted Answer

A)  correlation coefficient. 
B)  ​a deviation. 
C)  ​an outlier. 
D)  ​a variable. 
A)  correlation coefficient. 
B)  ​a deviation. 
C)  ​an outlier. 
D)  ​a variable.

Question 19

A researcher has collected the following sample data.The mean of the sample is 5. $$\begin{array} { l l l l l } 
3 & 5 & 12 & 3 & 2
\end{array}$$ The interquartile range is

Accepted Answer

A)  2. 
B)  2.25. 
C)  6. 
D)  9. 
A)  2. 
B)  2.25. 
C)  6. 
D)  9.

Question 20

The measure of location which is the most likely to be influenced by extreme values in the data set is the

Accepted Answer

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

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

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

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20.In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40.In which state do the wages of cashiers appear to be more dispersed?

Below you are given a sample of ACT scores of 12 college applicants. 19 23 27 21 32 17 20 29 22 30 25 15 a. Determine the first quartile. b. Determine the 75^th percentile. c. Determine the interquartile range.

The following is the frequency distribution for the speed of a sample of automobiles traveling on an interstate highway. Speed (mph) Frequency 50-54 2 55-59 4 60-64 5 65-69 10 70-74 9 75-79 35 The standard deviation is

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

A researcher has collected the following sample data. 5 12 6 8 5 6 7 5 12 4 The 75th percentile is

For data skewed to the left, the skewness is

When n-1 is used in the denominator to compute variance,

The following is a frequency distribution for the ages of a sample of employees at a local company. Age Frequency 30-39 2 40-49 3 50-59 7 60-69 5 70-79 1 a. Determine the average age for the sample. b. Compute the variance. c. Compute the standard deviation. d. Compute the coefficient of variation.

μ is an example of a

An unusually small or unusually large data value is called

A researcher has collected the following sample data.The mean of the sample is 5. 3 5 12 3 2 The interquartile range is

The measure of location which is the most likely to be influenced by extreme values in the data set is the

Data and Statistics

Descriptive Statistics: Tabulargraphical

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, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 3: Descriptive Statistics: Numerical

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

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

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20.In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40.In which state do the wages of cashiers appear to be more dispersed?

Below you are given a sample of ACT scores of 12 college applicants. 19 23 27 21 32 17 20 29 22 30 25 15 ​ a. Determine the first quartile. b. Determine the 75th percentile. c. Determine the interquartile range.

The following is the frequency distribution for the speed of a sample of automobiles traveling on an interstate highway. Speed (mph) Frequency 50-54 2 55-59 4 60-64 5 65-69 10 70-74 9 75-79 35 The standard deviation is

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

A researcher has collected the following sample data. 5 12 6 8 5 6 7 5 12 4 The 75th percentile is

​For data skewed to the left, the skewness is

When n-1 is used in the denominator to compute variance,

μ is an example of a​

​An unusually small or unusually large data value is called

A researcher has collected the following sample data.The mean of the sample is 5. 3 5 12 3 2 The interquartile range is

The measure of location which is the most likely to be influenced by extreme values in the data set is the

Data and Statistics

Descriptive Statistics: Tabulargraphical

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, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Below you are given a sample of ACT scores of 12 college applicants. 19 23 27 21 32 17 20 29 22 30 25 15 a. Determine the first quartile. b. Determine the 75^th percentile. c. Determine the interquartile range.

For data skewed to the left, the skewness is

μ is an example of a

An unusually small or unusually large data value is called