Question 1

Which of the following statements is true regarding the normal distribution?

Accepted Answer

A)  The mean is greater than the median and the median is greater than the mode. 
B)  The mean is less than the median and the median is less than the mode. 
C)  There is no difference in the values of the mean,median,and mode. 
D)  The mean is greater than the mode,which in turn is greater than the median. 
E)  The mean is less than the mode,which in turn is less than the median. 
A)  The mean is greater than the median and the median is greater than the mode. 
B)  The mean is less than the median and the median is less than the mode. 
C)  There is no difference in the values of the mean,median,and mode. 
D)  The mean is greater than the mode,which in turn is greater than the median. 
E)  The mean is less than the mode,which in turn is less than the median.

Question 2

The measure of central tendency that is most affected by extreme values is the:

Accepted Answer

A)  range. 
B)  mean. 
C)  median. 
D)  mode. 
E)  coefficient of variation. 
A)  range. 
B)  mean. 
C)  median. 
D)  mode. 
E)  coefficient of variation.

Question 3

Using the grouped data below,determine the population mean and population standard deviation: $$\begin{array} { | c | c | } 
\hline \text { Sales (\$1000) } & \text { Frequency } \
\hline 10 - 14 & 1 \
15 - 19 & 2 \
20 - 24 & 5 \
25 - 29 & 3 \
30 - 34 & 5 \
35 - 39 & 12 \
40 - 44 & 5 \
\hline
\end{array}$$ $\mu$ = ____________________. 
$ \sigma $____________________.

Accepted Answer

The answer of Using the grouped data below,determine the population...

Question 4

Which of the following statements is not correct?

Accepted Answer

A)  Measures of central tendency determined from frequency distributions will only be approximations of the actual values. 
B)  Measures of dispersion determined from frequency distributions will only be approximations of the actual values. 
C)  In grouped data,each observation is given the value of its classification's mid-point. 
D)  When data are grouped,the value of each individual observation is lost. 
E)  All of the above statements are correct. 
A)  Measures of central tendency determined from frequency distributions will only be approximations of the actual values. 
B)  Measures of dispersion determined from frequency distributions will only be approximations of the actual values. 
C)  In grouped data,each observation is given the value of its classification's mid-point. 
D)  When data are grouped,the value of each individual observation is lost. 
E)  All of the above statements are correct.

Question 5

Variables
A sample of eight observations of variables x and y is shown below: $$\begin{array} { | l | l l l l l l l l | } 
\hline x & 5 & 3 & 7 & 9 & 2 & 4 & 6 & 8 \
\hline y & 20 & 23 & 15 & 11 & 27 & 21 & 17 & 14 \
\hline
\end{array}$$
-Find the best-fit line: $\hat{ Y }$ = ____________________.
Estimate the value of y when x = 5.

Accepted Answer

30.155-2.1

Question 6

According to Chebyshev's theorem,what percentage of observations should fall within:
A)2.5 standard deviations of the mean? At least: ____________________.
B)3.0 standard deviations of the mean? At least: ____________________.
C)3.5 standard deviations of the mean? At least: ____________________.
D)4.0 standard deviations of the mean? At least: ____________________.

Accepted Answer

At least 84%; at lea

Question 7

A sample of 13 monthly sales figures (in thousands of dollars)are: 10,6,5,10,9,7,10,9,6,8,9,6,and 6.
What is the sample variance?

Accepted Answer

The answer of A sample of 13 monthly sales figures...

Question 8

In a negatively skewed distribution,the:

Accepted Answer

A)  mean is greater than the median and the median is greater than the mode. 
B)  mean is greater than the median and the median is smaller than the mode. 
C)  mean is smaller than the median and the median is greater than the mode. 
D)  mean is smaller than the median and the median is smaller than the mode. 
E)  mean is equal to the median and the median is equal to the mode. 
A)  mean is greater than the median and the median is greater than the mode. 
B)  mean is greater than the median and the median is smaller than the mode. 
C)  mean is smaller than the median and the median is greater than the mode. 
D)  mean is smaller than the median and the median is smaller than the mode. 
E)  mean is equal to the median and the median is equal to the mode.

Question 9

TV Markets
The top twenty TV markets in the United States are: $$\begin{array} { | c | c | } 
\hline \text { Market } & \text { TV Homes } \
\hline \text { New York } & 6,377,180 \
\text { Los Angeles } & 4,138,000 \
\text { Chicago } & 2,912,020 \
\text { Philadelphia } & 2,378,170 \
\text { San Francisco } & 1,922,180 \
\text { Boston-Worcester } & 1,892,770 \
\text { Detroit } & 1,659,020 \
\text { Cleveland } & 1,390,300 \
\text { Washington D.C. } & 1,339,480 \
\text { Dallas-Ft. Worth } & 1,318,340 \
\text { Houston } & 1,209,410 \
\text { Pittsburgh } & 1,208,260 \
\text { Miami } & 1,071,000 \
\text { Seattle } & 1,062,040 \
\text { Minneapolis } & 1,039,790 \
\text { Atlanta } & 1,034,820 \
\text { St. Louis } & 1,016,560 \
\text { Tampa } & 997,800 \
\text { Indianapolis } & 841,510 \
\text { Baltimore } & 824,730 \
\hline
\end{array}$$
-What is the first quartile?
____________________

Accepted Answer

The answer of TV Markets
The top twenty TV markets in...

Question 10

Which of the following is the simplest measure of dispersion?

Accepted Answer

A)  Range 
B)  Mean absolute deviation 
C)  Standard deviation 
D)  Coefficient of variation 
E)  Variance 
A)  Range 
B)  Mean absolute deviation 
C)  Standard deviation 
D)  Coefficient of variation 
E)  Variance

Question 11

A study was conducted of the 12-month earnings per share for two categories of airline companies. $$\begin{array} { | c | c | } 
\hline \text { Large Airlines } & \text { Small Airlines } \
\hline \$ 4.36 & \$ 1.60 \
6.19 & - 1.98 \
- 0.42 & 1.03 \
3.73 & - 0.21 \
0.26 & - 1.15 \
6.27 & 4.19 \
& 0.59 \
& 1.52 \
& 1.97 \
& 4.57 \
& 0.05 \
\hline
\end{array}$$ Based on the above data,which of the following statements is correct?

Accepted Answer

A)  The large airlines have a coefficient of variation of 2.44 while the small airlines have a coefficient of variation of 3.64. 
B)  Because the large airlines have mean earnings per share of 3.40 and the small airlines have mean earnings per share of 1.11,the large airlines have the largest coefficient of variation. 
C)  Because the large airlines have mean earnings per share of 3.54 and the small airlines have mean earnings per share of 1.71,the large airlines have the largest coefficient of variation. 
D)  The large airlines have a coefficient of variation of 0.85 and the small airlines have a coefficient of variation of 2.72. 
E)  The large airlines have a coefficient of variation of 0.81 and the small airlines have a coefficient of variation of 1.17. 
A)  The large airlines have a coefficient of variation of 2.44 while the small airlines have a coefficient of variation of 3.64. 
B)  Because the large airlines have mean earnings per share of 3.40 and the small airlines have mean earnings per share of 1.11,the large airlines have the largest coefficient of variation. 
C)  Because the large airlines have mean earnings per share of 3.54 and the small airlines have mean earnings per share of 1.71,the large airlines have the largest coefficient of variation. 
D)  The large airlines have a coefficient of variation of 0.85 and the small airlines have a coefficient of variation of 2.72. 
E)  The large airlines have a coefficient of variation of 0.81 and the small airlines have a coefficient of variation of 1.17.

Question 12

Find the mean,median,mode,and range for these data values: 14,12,11,11,16,18,11,and 10.
Mean = ____________________
Median = ____________________
Mode = ____________________
Range = ____________________

Accepted Answer

The answer of Find the mean,median,mode,and range for these data...

Question 13

Data set A: 2,4,6,8,and 10.
Data set B: 30,24,22,26,and 28.
Which data set has the larger mean,A or B?

Accepted Answer

The answer of Data set A: 2,4,6,8,and 10.
Data set B:...

Question 14

A company counted the number of all of their employees in each of the following age classes.According to this distribution,what is the standard deviation for the age of the employees in the company?
 $$\begin{array} { | c | c | } 
\hline \text { Age Range } & \text { Number of Emplayees } \
\hline 20 - 24 & 8 \
\hline 25 - 29 & 37 \
\hline 30 - 34 & 25 \
\hline 35 - 39 & 48 \
\hline 40 - 44 & 27 \
\hline 45 - 49 & 10 \
\hline
\end{array}$$

Accepted Answer

6.90 years old; This

Question 15

If the coefficient of correlation $ r=\pm 1 $ ,then the best-fit linear equation will include:

Accepted Answer

A)  75% of the data points. 
B)  85% of the data points. 
C)  95% of the data points. 
D)  all of the data points. 
A)  75% of the data points. 
B)  85% of the data points. 
C)  95% of the data points. 
D)  all of the data points.

Question 16

The speed of cars traveling down a particular road follows a distribution that is not bell-shaped and symmetrical has a mean equal to 50 miles per hour (MPH)and a standard deviation equal to 6 MPH.What is the minimum percent of cars that would be expected to fall between 38 MPH and 62 MPH?

Accepted Answer

Using Chebyshev's Th

Question 17

Find the range,median,mean,and variance for the following sample data: $$\begin{array} { | c | c | } 
\hline \text { Magazine } & \text { Yearly Rates } \
\hline \text { Americana } & 9.95 \
\text { Field \& Stream } & 7.94 \
\text { Guns \& Ammo } & 8.97 \
\text { Jet } & 13.95 \
\text { Motor Trend } & 7.97 \
\text { Parents } & 9.95 \
\text { Teen } & 6.95 \
\text { PC } & 8.97 \
\text { Ski } & 6.97 \
\text { People } & 27.88 \
\text { Playboy } & 19.00 \
\text { Skin Diver } & 6.97 \
\text { Sport } & 7.97 \
\text { Total Fitness } & 9.60 \
\text { Cycle } & 6.99 \
\text { Money } & 19.96 \
\text { Rolling Stone } & 12.98 \
\text { Golf } & 8.97 \
\hline
\end{array}$$ Range = ____________________.
Median = ____________________. 
$\bar { x }$ = ____________________.
s2 = ____________________.

Accepted Answer

20.93; 8.9

Question 18

Sample values of 13 monthly sales figures (in thousands of dollars)are: 6,5,6,6,7,8,9,10,10,10,9,9,and 6.
What is the mode?
____________________ thousand

Accepted Answer

The answer of Sample values of 13 monthly sales figures...

Question 19

Pizza
In preparation for a pizza party,the students at State University surveyed the price of medium-sized pizzas for local restaurants: $$\begin{array} { | c | c | } 
\hline \text { Restaurant } & \text { Price } \
\hline \text { Mr. Gattis } & 7.15 \
\text { Pizza Hut } & 7.00 \
\text { Little Italy } & 6.85 \
\text { Dominos } & 8.00 \
\text { Pizza Inn } & 7.50 \
\text { Mazzios } & 6.45 \
\text { Rossini's } & 8.50 \
\text { Pizza Works } & 7.75 \
\hline
\end{array}$$
-What is the mid-range?

Accepted Answer

The answer of Pizza
In preparation for a pizza party,the students...

Question 20

Measures of central tendency and dispersion determined from frequency distributions are only approximations of the actual values.

Accepted Answer

A) True 
 B)False

Which of the following statements is true regarding the normal distribution?

The measure of central tendency that is most affected by extreme values is the:

Using the grouped data below,determine the population mean and population standard deviation: Sales ( \1 000) Frequency 10-14 1 15-19 2 20-24 5 25-29 3 30-34 5 35-39 12 40-44 5 $\mu$ = . $\sigma$ .

Which of the following statements is not correct?

Variables A sample of eight observations of variables x and y is shown below: x 5 3 7 9 2 4 6 8 y 20 23 15 11 27 21 17 14 -Find the best-fit line: $\hat{ Y }$ = ____________________. Estimate the value of y when x = 5.

According to Chebyshev's theorem,what percentage of observations should fall within: A)2.5 standard deviations of the mean? At least: . B)3.0 standard deviations of the mean? At least: . C)3.5 standard deviations of the mean? At least: . D)4.0 standard deviations of the mean? At least: .

A sample of 13 monthly sales figures (in thousands of dollars)are: 10,6,5,10,9,7,10,9,6,8,9,6,and 6. What is the sample variance?

In a negatively skewed distribution,the:

Which of the following is the simplest measure of dispersion?

A study was conducted of the 12-month earnings per share for two categories of airline companies. Large Airlines Small Airlines \ 4.36 \ 1.60 6.19 -1.98 -0.42 1.03 3.73 -0.21 0.26 -1.15 6.27 4.19 0.59 1.52 1.97 4.57 0.05 Based on the above data,which of the following statements is correct?

Find the mean,median,mode,and range for these data values: 14,12,11,11,16,18,11,and 10. Mean = Median = Mode = Range =

Data set A: 2,4,6,8,and 10. Data set B: 30,24,22,26,and 28. Which data set has the larger mean,A or B?

A company counted the number of all of their employees in each of the following age classes.According to this distribution,what is the standard deviation for the age of the employees in the company? Age Range Number of Emplayees 20-24 8 25-29 37 30-34 25 35-39 48 40-44 27 45-49 10

If the coefficient of correlation $r=\pm 1$ ,then the best-fit linear equation will include:

The speed of cars traveling down a particular road follows a distribution that is not bell-shaped and symmetrical has a mean equal to 50 miles per hour (MPH)and a standard deviation equal to 6 MPH.What is the minimum percent of cars that would be expected to fall between 38 MPH and 62 MPH?

Sample values of 13 monthly sales figures (in thousands of dollars)are: 6,5,6,6,7,8,9,10,10,10,9,9,and 6. What is the mode? ____________________ thousand

Pizza In preparation for a pizza party,the students at State University surveyed the price of medium-sized pizzas for local restaurants: Restaurant Price Mr. Gattis 7.15 Pizza Hut 7.00 Little Italy 6.85 Dominos 8.00 Pizza Inn 7.50 Mazzios 6.45 Rossini's 8.50 Pizza Works 7.75 -What is the mid-range?

Measures of central tendency and dispersion determined from frequency distributions are only approximations of the actual values.

A Preview of Business Statistics

Visual Description of Data

Data Collection and Sampling Methods

Probability: Review of Basic Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Estimation From Sample Data

Hypothesis Tests Involving a Sample Mean or Proportion

Hypothesis Tests Involving Two Sample Means

Analysis of Variance Tests

Chi-Square Applications

Nonparametric Methods

Simple Linear Regression and Correlation

Multiple Regression and Correlation

Model Building

Models for Time Series and Forecasting

Decision Theory

Total Quality Management

Filters

Exam 3: Statistical Description of Data

Which of the following statements is true regarding the normal distribution?

The measure of central tendency that is most affected by extreme values is the:

Using the grouped data below,determine the population mean and population standard deviation: Sales ( \1 000) Frequency 10-14 1 15-19 2 20-24 5 25-29 3 30-34 5 35-39 12 40-44 5 μ\muμ = ____________________. σ \sigma σ ____________________.

Which of the following statements is not correct?

Variables A sample of eight observations of variables x and y is shown below: x 5 3 7 9 2 4 6 8 y 20 23 15 11 27 21 17 14 -Find the best-fit line: Y^\hat{ Y }Y^ = ____________________. Estimate the value of y when x = 5.

A sample of 13 monthly sales figures (in thousands of dollars)are: 10,6,5,10,9,7,10,9,6,8,9,6,and 6. What is the sample variance?

In a negatively skewed distribution,the:

Which of the following is the simplest measure of dispersion?

A study was conducted of the 12-month earnings per share for two categories of airline companies. Large Airlines Small Airlines \ 4.36 \ 1.60 6.19 -1.98 -0.42 1.03 3.73 -0.21 0.26 -1.15 6.27 4.19 0.59 1.52 1.97 4.57 0.05 Based on the above data,which of the following statements is correct?

Find the mean,median,mode,and range for these data values: 14,12,11,11,16,18,11,and 10. Mean = ____________________ Median = ____________________ Mode = ____________________ Range = ____________________

Data set A: 2,4,6,8,and 10. Data set B: 30,24,22,26,and 28. Which data set has the larger mean,A or B?

A company counted the number of all of their employees in each of the following age classes.According to this distribution,what is the standard deviation for the age of the employees in the company? Age Range Number of Emplayees 20-24 8 25-29 37 30-34 25 35-39 48 40-44 27 45-49 10

If the coefficient of correlation r=±1 r=\pm 1 r=±1 ,then the best-fit linear equation will include:

The speed of cars traveling down a particular road follows a distribution that is not bell-shaped and symmetrical has a mean equal to 50 miles per hour (MPH)and a standard deviation equal to 6 MPH.What is the minimum percent of cars that would be expected to fall between 38 MPH and 62 MPH?

Sample values of 13 monthly sales figures (in thousands of dollars)are: 6,5,6,6,7,8,9,10,10,10,9,9,and 6. What is the mode? ____________________ thousand

Pizza In preparation for a pizza party,the students at State University surveyed the price of medium-sized pizzas for local restaurants: Restaurant Price Mr. Gattis 7.15 Pizza Hut 7.00 Little Italy 6.85 Dominos 8.00 Pizza Inn 7.50 Mazzios 6.45 Rossini's 8.50 Pizza Works 7.75 -What is the mid-range?

Measures of central tendency and dispersion determined from frequency distributions are only approximations of the actual values.

A Preview of Business Statistics

Visual Description of Data

Data Collection and Sampling Methods

Probability: Review of Basic Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Estimation From Sample Data

Hypothesis Tests Involving a Sample Mean or Proportion

Hypothesis Tests Involving Two Sample Means

Analysis of Variance Tests

Chi-Square Applications

Nonparametric Methods

Simple Linear Regression and Correlation

Multiple Regression and Correlation

Model Building

Models for Time Series and Forecasting

Decision Theory

Total Quality Management

Filters

Using the grouped data below,determine the population mean and population standard deviation: Sales ( \1 000) Frequency 10-14 1 15-19 2 20-24 5 25-29 3 30-34 5 35-39 12 40-44 5 $\mu$ = . $\sigma$ .

Variables A sample of eight observations of variables x and y is shown below: x 5 3 7 9 2 4 6 8 y 20 23 15 11 27 21 17 14 -Find the best-fit line: $\hat{ Y }$ = ____________________. Estimate the value of y when x = 5.

Find the mean,median,mode,and range for these data values: 14,12,11,11,16,18,11,and 10. Mean = Median = Mode = Range =

If the coefficient of correlation $r=\pm 1$ ,then the best-fit linear equation will include: