Question 1

The advantage of using the interquartile range as a measure of variation is that it utilizes all the data in its computation.

Accepted Answer

A) True 
 B)False

Question 2

A statistic is just another name for a parameter.

Accepted Answer

A) True 
 B)False

Question 3

When surveyed,a sample of 1,250 patients at a regional hospital provided interviewers with the following summary statistics pertaining to the hospital charges:
Minimum = $278.00 Q1 = $1,245 Q2 = $3,567 Q3= $4,702.
Based on these data,the distribution is seen to be symmetric.

Accepted Answer

A) True 
 B)False

Question 4

Suppose a study of houses that have sold recently in your community showed the following frequency distribution for the number of bedrooms:   Based on this information,the median number of bedrooms in houses sold is 3.20.

Accepted Answer

A) True 
 B)False

Question 5

One of the primary advantages of using the median as a measure of the center for a set of data is that the median is not affected by extreme values in the data.

Accepted Answer

A) True 
 B)False

Question 6

When comparing data measured by substantially different scales,we must use

Accepted Answer

A) standardized data values. 
B) standardized data scales. 
C) standardized data variations. 
D) standardized data scores. 
A) standardized data values. 
B) standardized data scales. 
C) standardized data variations. 
D) standardized data scores.

Question 7

In order to compute the mean and standard deviation,the level of data measurement should be:

Accepted Answer

A) ratio or interval. 
B) qualitative. 
C) nominal. 
D) ordinal. 
A) ratio or interval. 
B) qualitative. 
C) nominal. 
D) ordinal.

Question 8

Which of the following measures is not affected by extreme values in the data?

Accepted Answer

A) The mean 
B) The median 
C) The range 
D) The standard deviation 
A) The mean 
B) The median 
C) The range 
D) The standard deviation

Question 9

For ordinal data,________ is the preferred measure of central location.

Accepted Answer

A) the mean 
B) the median 
C) the percentile 
D) the quartile 
A) the mean 
B) the median 
C) the percentile 
D) the quartile

Question 10

A recent study involving a sample of 3,000 vehicles in California showed the following statistics related to the number of miles driven per day: Q1 = 12 Q2 = 45 and Q3 = 56.Based on these data,if a box and whisker plot is developed,a value of 110 is an outlier.

Accepted Answer

A) True 
 B)False

Question 11

At a sawmill in Oregon,a process improvement team measured the diameters for a sample of 1,500 logs.The following summary statistics were computed: Q1 = 8.9 in.Q2 = 13.5 in.Q3 = 15.6 in   in.
Given this information,which of the following statements is correct?

Accepted Answer

A) The distribution of log diameters is symmetric. 
B) A log that is over 20 inches in diameter can be considered an outlier. 
C) The distribution of log diameters is right-skewed. 
D) The distribution is left-skewed. 
A) The distribution of log diameters is symmetric. 
B) A log that is over 20 inches in diameter can be considered an outlier. 
C) The distribution of log diameters is right-skewed. 
D) The distribution is left-skewed.

Question 12

Consider the following data,which represent the number of miles that employees commute from home to work each day.There are two samples: one for males and one for females. Males:   Females:   The coefficient of variation of commute miles for the males is:

Accepted Answer

A) approximately 76 percent. 
B) about 7.8. 
C) approximately 61.5. 
D) about 67 percent. 
A) approximately 76 percent. 
B) about 7.8. 
C) approximately 61.5. 
D) about 67 percent.

Question 13

The asking price for homes on the real estate market in Baltimore has a mean value of $286,455 and a standard deviation of $11,200.The mean and standard deviation in asking price for homes in Denver are $188,468 and $8,230,respectively.Recently,one home sold in each city where the asking price for each home was $193,000.Assuming that both distributions are bell-shaped,which of the following statements is true?

Accepted Answer

A) The Baltimore home has the higher standard z-value. 
B) The coefficient of variation for Denver is less than for Baltimore. 
C) The Denver home has a higher standard z-value. 
D) Both cities have the same coefficient of variation. 
A) The Baltimore home has the higher standard z-value. 
B) The coefficient of variation for Denver is less than for Baltimore. 
C) The Denver home has a higher standard z-value. 
D) Both cities have the same coefficient of variation.

Question 14

A small company has 7 employees.The numbers of years these employees have worked for this company are shown as follows:   Based upon this information,the median number of years that employees have been with this company is:

Accepted Answer

A) 9 years. 
B) 16 years. 
C) 10 years. 
D) 14 years. 
A) 9 years. 
B) 16 years. 
C) 10 years. 
D) 14 years.

Question 15

First Pacific Bank has determined that the mean checking account balance for all its customers is currently $743.50.Based on this,it is fair to say that about half the customers have balances exceeding $743.50.

Accepted Answer

A) True 
 B)False

Question 16

In comparing two distributions with the same mean,the coefficient of variation is the only way to assess which distribution has the greatest relative variability.

Accepted Answer

A) True 
 B)False

Question 17

In a recent study of the sales prices of houses in a Midwestern city,the mean sales price has been reported to be $167,811 while the median sales price was $155,600.From this information,you can determine that the data involved in the study are left-skewed.

Accepted Answer

A) True 
 B)False

Question 18

If the age distribution of customers at a major retail chain is thought to be bell-shaped with a mean equal to 43 years and a standard deviation equal to 7 years,the percentage of customers between the ages of 29 and 57 years is:

Accepted Answer

A) approximately 81.5. 
B) approximately 68. 
C) at least 75. 
D) approximately 95. 
A) approximately 81.5. 
B) approximately 68. 
C) at least 75. 
D) approximately 95.

Question 19

Suppose a study of houses that have sold recently in your community showed the following frequency distribution for the number of bedrooms:   Based on this information the mean number of bedrooms in houses that sold is approximately 3.26.

Accepted Answer

A) True 
 B)False

Question 20

The second quartile for a set of data will have the same value as the 50th percentile only when the data are symmetric.

Accepted Answer

A) True 
 B)False

The advantage of using the interquartile range as a measure of variation is that it utilizes all the data in its computation.

A statistic is just another name for a parameter.

When surveyed,a sample of 1,250 patients at a regional hospital provided interviewers with the following summary statistics pertaining to the hospital charges: Minimum = $278.00 Q1 = $1,245 Q2 = $3,567 Q3= $4,702. Based on these data,the distribution is seen to be symmetric.

Suppose a study of houses that have sold recently in your community showed the following frequency distribution for the number of bedrooms: Based on this information,the median number of bedrooms in houses sold is 3.20.

One of the primary advantages of using the median as a measure of the center for a set of data is that the median is not affected by extreme values in the data.

When comparing data measured by substantially different scales,we must use

In order to compute the mean and standard deviation,the level of data measurement should be:

Which of the following measures is not affected by extreme values in the data?

For ordinal data,________ is the preferred measure of central location.

A recent study involving a sample of 3,000 vehicles in California showed the following statistics related to the number of miles driven per day: Q1 = 12 Q2 = 45 and Q3 = 56.Based on these data,if a box and whisker plot is developed,a value of 110 is an outlier.

At a sawmill in Oregon,a process improvement team measured the diameters for a sample of 1,500 logs.The following summary statistics were computed: Q1 = 8.9 in.Q2 = 13.5 in.Q3 = 15.6 in in. Given this information,which of the following statements is correct?

Consider the following data,which represent the number of miles that employees commute from home to work each day.There are two samples: one for males and one for females. Males: Females: The coefficient of variation of commute miles for the males is:

A small company has 7 employees.The numbers of years these employees have worked for this company are shown as follows: Based upon this information,the median number of years that employees have been with this company is:

First Pacific Bank has determined that the mean checking account balance for all its customers is currently $743.50.Based on this,it is fair to say that about half the customers have balances exceeding $743.50.

In comparing two distributions with the same mean,the coefficient of variation is the only way to assess which distribution has the greatest relative variability.

In a recent study of the sales prices of houses in a Midwestern city,the mean sales price has been reported to be $167,811 while the median sales price was $155,600.From this information,you can determine that the data involved in the study are left-skewed.

If the age distribution of customers at a major retail chain is thought to be bell-shaped with a mean equal to 43 years and a standard deviation equal to 7 years,the percentage of customers between the ages of 29 and 57 years is:

Suppose a study of houses that have sold recently in your community showed the following frequency distribution for the number of bedrooms: Based on this information the mean number of bedrooms in houses that sold is approximately 3.26.

The second quartile for a set of data will have the same value as the 50^th percentile only when the data are symmetric.

The Where, why, and How of Data Collection

Graphs,charts and Tablesdescribing Your Data

Using Probability and Probability Distributions

Discrete Probability Distributions

Introduction to Continuous Probability Distributions

Introduction to Sampling Distributions

Estimating Single Population Parameters

Introduction to Hypothesis Testing

Estimation and Hypothesis Testing for Two Population Parameters

Hypothesis Tests and Estimation for Population Variances

Analysis of Variance

Goodness-Of-Fit Tests and Contingency Analysis

Introduction to Linear Regression and Correlation Analysis

Multiple Regression Analysis and Model Building

Analyzing and Forecasting Time-Series Data

Introduction to Nonparametric Statistics

Introduction to Quality and Statistical Process Control

Introduction to Decision Analysis

Filters

Exam 3: Describing Data Using Numerical Measures

The advantage of using the interquartile range as a measure of variation is that it utilizes all the data in its computation.

A statistic is just another name for a parameter.

When surveyed,a sample of 1,250 patients at a regional hospital provided interviewers with the following summary statistics pertaining to the hospital charges: Minimum = $278.00 Q1 = $1,245 Q2 = $3,567 Q3= $4,702. Based on these data,the distribution is seen to be symmetric.

Suppose a study of houses that have sold recently in your community showed the following frequency distribution for the number of bedrooms: Based on this information,the median number of bedrooms in houses sold is 3.20.

One of the primary advantages of using the median as a measure of the center for a set of data is that the median is not affected by extreme values in the data.

When comparing data measured by substantially different scales,we must use

In order to compute the mean and standard deviation,the level of data measurement should be:

Which of the following measures is not affected by extreme values in the data?

For ordinal data,________ is the preferred measure of central location.

A recent study involving a sample of 3,000 vehicles in California showed the following statistics related to the number of miles driven per day: Q1 = 12 Q2 = 45 and Q3 = 56.Based on these data,if a box and whisker plot is developed,a value of 110 is an outlier.

At a sawmill in Oregon,a process improvement team measured the diameters for a sample of 1,500 logs.The following summary statistics were computed: Q1 = 8.9 in.Q2 = 13.5 in.Q3 = 15.6 in in. Given this information,which of the following statements is correct?

Consider the following data,which represent the number of miles that employees commute from home to work each day.There are two samples: one for males and one for females. Males: Females: The coefficient of variation of commute miles for the males is:

A small company has 7 employees.The numbers of years these employees have worked for this company are shown as follows: Based upon this information,the median number of years that employees have been with this company is:

First Pacific Bank has determined that the mean checking account balance for all its customers is currently $743.50.Based on this,it is fair to say that about half the customers have balances exceeding $743.50.

In comparing two distributions with the same mean,the coefficient of variation is the only way to assess which distribution has the greatest relative variability.

In a recent study of the sales prices of houses in a Midwestern city,the mean sales price has been reported to be $167,811 while the median sales price was $155,600.From this information,you can determine that the data involved in the study are left-skewed.

If the age distribution of customers at a major retail chain is thought to be bell-shaped with a mean equal to 43 years and a standard deviation equal to 7 years,the percentage of customers between the ages of 29 and 57 years is:

Suppose a study of houses that have sold recently in your community showed the following frequency distribution for the number of bedrooms: Based on this information the mean number of bedrooms in houses that sold is approximately 3.26.

The second quartile for a set of data will have the same value as the 50th percentile only when the data are symmetric.

The Where, why, and How of Data Collection

Graphs,charts and Tablesdescribing Your Data

Using Probability and Probability Distributions

Discrete Probability Distributions

Introduction to Continuous Probability Distributions

Introduction to Sampling Distributions

Estimating Single Population Parameters

Introduction to Hypothesis Testing

Estimation and Hypothesis Testing for Two Population Parameters

Hypothesis Tests and Estimation for Population Variances

Analysis of Variance

Goodness-Of-Fit Tests and Contingency Analysis

Introduction to Linear Regression and Correlation Analysis

Multiple Regression Analysis and Model Building

Analyzing and Forecasting Time-Series Data

Introduction to Nonparametric Statistics

Introduction to Quality and Statistical Process Control

Introduction to Decision Analysis

Filters

The second quartile for a set of data will have the same value as the 50^th percentile only when the data are symmetric.