Question 1

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 2

Which of the following is not a measure of dispersion?

Accepted Answer

A) mode 
B) standard deviation 
C) range 
D) interquartile range 
A) mode 
B) standard deviation 
C) range 
D) interquartile range

Question 3

Which of the following provides a measure of central location for the data?

Accepted Answer

A) standard deviation 
B) mean 
C) variance 
D) range 
A) standard deviation 
B) mean 
C) variance 
D) range

Question 4

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 5

The hourly wages of a sample of eight individuals is given below.
   For the above sample, determine the following measures: 
a.The mean.
b.The standard deviation.
c.The 25th percentile.

Accepted Answer

The answer of The hourly wages of a sample of...

Question 6

Since the mode is the most frequently occurring data value, it

Accepted Answer

A) can never be larger than the mean 
B) is always larger than the median 
C) is always larger than the mean 
D) None of these alternatives is correct. 
A) can never be larger than the mean 
B) is always larger than the median 
C) is always larger than the mean 
D) None of these alternatives is correct.

Question 7

Exhibit 3-6
The closing stock price of MNM Corporation for the last 7 trading days is shown below.
  
-Refer to Exhibit 3-6. The mean is

Accepted Answer

A) 84 
B) 85 
C) 86 
D) 87 
A) 84 
B) 85 
C) 86 
D) 87

Question 8

In 2009, the average donation to the Community Kitchen was $900 with a standard deviation of $180. In 2010, the average donation was $1,600 with a standard deviation of $240. In which year do the donations show a more dispersed distribution?

Accepted Answer

The coefficient of variation i

Question 9

For the following frequency distribution,
   
a.Compute the mean.
b.Compute the standard deviation. (Assume the data represent a population.)

Accepted Answer

The answer of For the following frequency distribution,
  ...

Question 10

Exhibit 3-5
You are given the following frequency distribution.
  
-Refer to Exhibit 3-5. The coefficient of variation is

Accepted Answer

A) 25% 
B) 21.91% 
C) 5.477% 
D) 30% 
A) 25% 
B) 21.91% 
C) 5.477% 
D) 30%

Question 11

Below you are given the ages of a sample of 10 college students who are enrolled in statistics.
   a. Compute the mean.
b. Compute the variance.
c. Compute the standard deviation.
d. Compute the coefficient of variation.
e. Determine the 25th percentile.
f. Determine the median
g. Determine the 75th percentile.
h. Determine the range.

Accepted Answer

a.20
b.4.6

Question 12

The following frequency distribution shows the GMAT scores of a sample of MBA students.
   For the above data, compute the mean GMAT score.

Accepted Answer

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

Question 13

Jason, a freshman at a local college, just completed 15 credit hours. His grade report is presented below.
   The local university uses a 4 point grading system, i.e., A = 4, B = 3, C = 2, D = 1, F = 0. Compute Jason's semester grade point average.

Accepted Answer

The answer of Jason, a freshman at a local college,...

Question 14

The following data show the yearly salaries of a sample of MBA graduates.
   
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.$88,000
b.$9,355.03
c.$94,00

Question 15

During a cold winter, the temperature stayed below zero for ten days (ranging from -20 to -5). The variance of the temperatures of the ten-day period

Accepted Answer

A) is negative since all the numbers are negative 
B) must be at least zero 
C) cannot be computed since all the numbers are negative 
D) can be either negative or positive 
A) is negative since all the numbers are negative 
B) must be at least zero 
C) cannot be computed since all the numbers are negative 
D) can be either negative or positive

Question 16

Compute the weighted mean for the following data.

Accepted Answer

The answer of Compute the weighted mean for the following...

Question 17

The number of hours worked per week for a sample of ten students is shown below.
   
a.Determine the median and explain its meaning.
b.Compute the 70th percentile and explain its meaning.
c.What is the mode of the above data? What does it signify?

Accepted Answer

a.19; approximately 50% of the

Question 18

The following data show the yearly salaries of a random sample of Chattanooga residents.
   For the above sample, determine the following measures (Give your answer in dollars): 
a.The mean yearly salary.
b.The standard deviation.
c.The mode.
d.The median.
e.
The 70th percentile

Accepted Answer

a.$74,000
b.$18,423.

Question 19

The amount of time that a sample of students spends watching television per day is given below.
   
a.Compute the mean.
b.Compute the median.
c.Compute the standard deviation.
d.Compute the 75th percentile.

Accepted Answer

a.46
b.44

Question 20

The coefficient of correlation ranges between

Accepted Answer

A) 0 and 1 
B) -1 and +1 
C) minus infinity and plus infinity 
D) 1 and 100 
A) 0 and 1 
B) -1 and +1 
C) minus infinity and plus infinity 
D) 1 and 100

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

Which of the following is not a measure of dispersion?

Which of the following provides a measure of central location for the data?

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.)

The hourly wages of a sample of eight individuals is given below. For the above sample, determine the following measures: a.The mean. b.The standard deviation. c.The 25th percentile.

Since the mode is the most frequently occurring data value, it

Exhibit 3-6 The closing stock price of MNM Corporation for the last 7 trading days is shown below. -Refer to Exhibit 3-6. The mean is

In 2009, the average donation to the Community Kitchen was $900 with a standard deviation of $180. In 2010, the average donation was $1,600 with a standard deviation of $240. In which year do the donations show a more dispersed distribution?

For the following frequency distribution, a.Compute the mean. b.Compute the standard deviation. (Assume the data represent a population.)

Exhibit 3-5 You are given the following frequency distribution. -Refer to Exhibit 3-5. The coefficient of variation is

The following frequency distribution shows the GMAT scores of a sample of MBA students. For the above data, compute the mean GMAT score.

Jason, a freshman at a local college, just completed 15 credit hours. His grade report is presented below. The local university uses a 4 point grading system, i.e., A = 4, B = 3, C = 2, D = 1, F = 0. Compute Jason's semester grade point average.

During a cold winter, the temperature stayed below zero for ten days (ranging from -20 to -5). The variance of the temperatures of the ten-day period

Compute the weighted mean for the following data.

The number of hours worked per week for a sample of ten students is shown below. a.Determine the median and explain its meaning. b.Compute the 70th percentile and explain its meaning. c.What is the mode of the above data? What does it signify?

The following data show the yearly salaries of a random sample of Chattanooga residents. For the above sample, determine the following measures (Give your answer in dollars): a.The mean yearly salary. b.The standard deviation. c.The mode. d.The median. e. The 70th percentile

The amount of time that a sample of students spends watching television per day is given below. a.Compute the mean. b.Compute the median. c.Compute the standard deviation. d.Compute the 75th percentile.

The coefficient of correlation ranges between

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters

Exam 3: Descriptive Statistics: Numerical Measures

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

Which of the following is not a measure of dispersion?

Which of the following provides a measure of central location for the data?

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.)

The hourly wages of a sample of eight individuals is given below. For the above sample, determine the following measures: a.The mean. b.The standard deviation. c.The 25th percentile.

Since the mode is the most frequently occurring data value, it

Exhibit 3-6 The closing stock price of MNM Corporation for the last 7 trading days is shown below. -Refer to Exhibit 3-6. The mean is

In 2009, the average donation to the Community Kitchen was $900 with a standard deviation of $180. In 2010, the average donation was $1,600 with a standard deviation of $240. In which year do the donations show a more dispersed distribution?

For the following frequency distribution, a.Compute the mean. b.Compute the standard deviation. (Assume the data represent a population.)

Exhibit 3-5 You are given the following frequency distribution. -Refer to Exhibit 3-5. The coefficient of variation is

The following frequency distribution shows the GMAT scores of a sample of MBA students. For the above data, compute the mean GMAT score.

Jason, a freshman at a local college, just completed 15 credit hours. His grade report is presented below. The local university uses a 4 point grading system, i.e., A = 4, B = 3, C = 2, D = 1, F = 0. Compute Jason's semester grade point average.

During a cold winter, the temperature stayed below zero for ten days (ranging from -20 to -5). The variance of the temperatures of the ten-day period

Compute the weighted mean for the following data.

The number of hours worked per week for a sample of ten students is shown below. a.Determine the median and explain its meaning. b.Compute the 70th percentile and explain its meaning. c.What is the mode of the above data? What does it signify?

The following data show the yearly salaries of a random sample of Chattanooga residents. For the above sample, determine the following measures (Give your answer in dollars): a.The mean yearly salary. b.The standard deviation. c.The mode. d.The median. e. The 70th percentile

The amount of time that a sample of students spends watching television per day is given below. a.Compute the mean. b.Compute the median. c.Compute the standard deviation. d.Compute the 75th percentile.

The coefficient of correlation ranges between

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters