Question 1

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 2

Consider the data in the following frequency distribution. Assume the data represent a population.   For the above data, compute the following. 
a.The mean
b.The variance
c.The standard deviation

Accepted Answer

The answer of Consider the data in the following frequency...

Question 3

Exhibit 3-2
A researcher has collected the following sample data
5 12 6 8 5 
6 7 5 12 4
-Refer to Exhibit 3-2. The median is

Accepted Answer

A) 5 
B) 6 
C) 7 
D) 8 
A) 5 
B) 6 
C) 7 
D) 8

Question 4

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 variance is

Accepted Answer

A) 2.828 
B) 8 
C) 9 
D) 81 
A) 2.828 
B) 8 
C) 9 
D) 81

Question 5

The 75th percentile is referred to as the

Accepted Answer

A) first quartile 
B) second quartile 
C) third quartile 
D) fourth quartile 
A) first quartile 
B) second quartile 
C) third quartile 
D) fourth quartile

Question 6

A private research organization studying families in various countries reported the following data for the amount of time 4-year-old children spent alone with their fathers each day.   For the above sample, determine the following measures: 
a.The mean
b.The standard deviation
c.The mode
d.The 75th percentile

Accepted Answer

a.43
b.7.5

Question 7

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 8

The 50th percentile is the

Accepted Answer

A) mode 
B) median 
C) mean 
D) third quartile 
A) mode 
B) median 
C) mean 
D) third quartile

Question 9

Geometric mean of five observations is

Accepted Answer

A) the same as weighted mean 
B) the same as mean 
C) square root of the product of the 5 observations 
D) fifth root of the product of the 5 observations 
A) the same as weighted mean 
B) the same as mean 
C) square root of the product of the 5 observations 
D) fifth root of the product of the 5 observations

Question 10

The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals

Accepted Answer

A) 8 
B) 10 
C) 6400 
D) 4,096 
A) 8 
B) 10 
C) 6400 
D) 4,096

Question 11

Exhibit 3-3
A researcher has collected the following sample data. The mean of the sample is 5.
3 5 12 3 2
-Refer to Exhibit 3-3. The variance is

Accepted Answer

A) 80 
B) 4.062 
C) 13.2 
D) 16.5 
A) 80 
B) 4.062 
C) 13.2 
D) 16.5

Question 12

The starting salaries of a sample of college students are given below.   
a.Compute the mean.
b.Compute the variance.
c.Compute the standard deviation.
d.Compute the coefficient of variation.

Accepted Answer

a.34
b.35.

Question 13

Exhibit 3-3
A researcher has collected the following sample data. The mean of the sample is 5.
3 5 12 3 2
-Refer to Exhibit 3-3. The standard deviation is

Accepted Answer

A) 8.944 
B) 4.062 
C) 13.2 
D) 16.5 
A) 8.944 
B) 4.062 
C) 13.2 
D) 16.5

Question 14

The geometric mean of 1, 1, 8 is

Accepted Answer

A) 10.0 
B) 2.0 
C) 3.33 
D) 3.0 
A) 10.0 
B) 2.0 
C) 3.33 
D) 3.0

Question 15

A recent survey of a local neighborhood measured the number of children per household. The results are given below.   For the above data compute the following measures. (Round to the nearest tenth, as needed.) 
a.The mean
b.Then median
c.The mode

Accepted Answer

The answer of A recent survey of a local neighborhood...

Question 16

The value of the sum of the deviations from the mean, i.e.,   must always be

Accepted Answer

A) less than the zero 
B) negative 
C) either positive or negative depending on whether the mean is negative or positive 
D) zero 
A) less than the zero 
B) negative 
C) either positive or negative depending on whether the mean is negative or positive 
D) zero

Question 17

The following shows the number of job losses and gains (in thousands) between 2008 and 2009 for a sample of seven cities.   
a.Compute the mean.
b.Determine the mode.
c.Determine the median.
d.Determine the standard deviation.

Accepted Answer

a.-4000
b.

Question 18

The growth rates in the population of Dalton for the past three years are shown below.   
a.Compute the Geometric mean
b.What has been the percentage growth in the population of Dalton?

Accepted Answer

a.1.036161

Question 19

Since the median is the middle value of a data set it

Accepted Answer

A) must always be smaller than the mode 
B) must always be larger than the mode 
C) must always be smaller than the mean 
D) None of these alternatives is correct. 
A) must always be smaller than the mode 
B) must always be larger than the mode 
C) must always be smaller than the mean 
D) None of these alternatives is correct.

Question 20

The symbol $\sigma$ is used to represent

Accepted Answer

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

Exam 3: Descriptive Statistics: Numerical Measures

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

Consider the data in the following frequency distribution. Assume the data represent a population. For the above data, compute the following. a.The mean b.The variance c.The standard deviation

Exhibit 3-2 A researcher has collected the following sample data 5 12 6 8 5 6 7 5 12 4 -Refer to Exhibit 3-2. The median is

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 variance is

The 75th percentile is referred to as 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.

The 50th percentile is the

Geometric mean of five observations is

The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals

Exhibit 3-3 A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 -Refer to Exhibit 3-3. The variance is

The starting salaries of a sample of college students are given below. a.Compute the mean. b.Compute the variance. c.Compute the standard deviation. d.Compute the coefficient of variation.

Exhibit 3-3 A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 -Refer to Exhibit 3-3. The standard deviation is

The geometric mean of 1, 1, 8 is

A recent survey of a local neighborhood measured the number of children per household. The results are given below. For the above data compute the following measures. (Round to the nearest tenth, as needed.) a.The mean b.Then median c.The mode

The value of the sum of the deviations from the mean, i.e., must always be

The following shows the number of job losses and gains (in thousands) between 2008 and 2009 for a sample of seven cities. a.Compute the mean. b.Determine the mode. c.Determine the median. d.Determine the standard deviation.

The growth rates in the population of Dalton for the past three years are shown below. a.Compute the Geometric mean b.What has been the percentage growth in the population of Dalton?

Since the median is the middle value of a data set it

The symbol σ\sigmaσ is used to represent

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, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Sample Survey on Website

Filters

The symbol $\sigma$ is used to represent