Question 1

A relative frequency distribution shows the number of observations in each class.

Accepted Answer

A) True 
 B)False

Question 2

Draw a bar graph that illustrates the relative frequencies.

Accepted Answer

Graph with appropriate labels

Question 3

For quantitative data,the relative frequency for a class is computed as the

Accepted Answer

A) class width divided by class interval. 
B) class midpoint divided by the class frequency. 
C) class frequency divided by the class interval. 
D) class frequency divided by the total frequency. 
A) class width divided by class interval. 
B) class midpoint divided by the class frequency. 
C) class frequency divided by the class interval. 
D) class frequency divided by the total frequency.

Question 4

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5".
What are the class limits for the third class?

Accepted Answer

A) 64 and up to 67 
B) 67 and 69 
C) 67 and up to 70 
D) 66 and 68 
A) 64 and up to 67 
B) 67 and 69 
C) 67 and up to 70 
D) 66 and 68

Question 5

Refer to the following distribution of commissions:   What is the class interval?

Accepted Answer

A) 200 
B) 300 
C) 3.500 
D) 400 
A) 200 
B) 300 
C) 3.500 
D) 400

Question 6

A frequency distribution for qualitative data shows the number of observations in each class.

Accepted Answer

A) True 
 B)False

Question 7

For qualitative data,the relative frequency for a class is computed as the

Accepted Answer

A) class width divided by class interval. 
B) class midpoint divided by the class frequency. 
C) class frequency divided by the class interval. 
D) class frequency divided by the total frequency. 
A) class width divided by class interval. 
B) class midpoint divided by the class frequency. 
C) class frequency divided by the class interval. 
D) class frequency divided by the total frequency.

Question 8

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5".
What is the class interval?

Accepted Answer

A) 1" 
B) 2" 
C) 2.5" 
D) 3" 
A) 1" 
B) 2" 
C) 2.5" 
D) 3"

Question 9

A cumulative frequency distribution is used when we want to determine how many observations lie above or below certain values.

Accepted Answer

A) True 
 B)False

Question 10

To summarize the gender of students attending a college,a frequency distribution groups data into two classes.

Accepted Answer

A) True 
 B)False

Question 11

When data is collected using a qualitative,nominal variable,i.e. ,male or female,what is true about a frequency distribution that summarizes the data?

Accepted Answer

A) Upper and lower class limits must be calculated. 
B) Class midpoints can be computed. 
C) Number of classes corresponds to number of the variable's values. 
D) The "2 to the k rule" can be applied. 
A) Upper and lower class limits must be calculated. 
B) Class midpoints can be computed. 
C) Number of classes corresponds to number of the variable's values. 
D) The "2 to the k rule" can be applied.

Question 12

To convert a frequency distribution to a relative frequency distribution,divide each class frequency by the sum of the class frequencies.

Accepted Answer

A) True 
 B)False

Question 13

A sample distribution of hourly earnings in Paul's Cookie Factory is:   The limits of the class with the smallest frequency are:

Accepted Answer

A) $6.00 and $9.00 
B) $12.00 and up to $14.00 
C) $11.75 and $14.25 
D) $12.00 and up to $15.00 
A) $6.00 and $9.00 
B) $12.00 and up to $14.00 
C) $11.75 and $14.25 
D) $12.00 and up to $15.00

Question 14

Refer to the following distribution of commissions:   The first plot for a cumulative frequency distribution would be:

Accepted Answer

A) X = 0,Y = 600. 
B) X = 600,Y = 3. 
C) X = 3,Y = 600. 
D) X = 600,Y = 0. 
A) X = 0,Y = 600. 
B) X = 600,Y = 3. 
C) X = 3,Y = 600. 
D) X = 600,Y = 0.

Question 15

Why are unequal class intervals sometimes used in a frequency distribution?

Accepted Answer

A) To avoid a large number of empty classes 
B) For the sake of variety in presenting the data 
C) To make the class frequencies smaller 
D) To avoid the need for midpoints 
A) To avoid a large number of empty classes 
B) For the sake of variety in presenting the data 
C) To make the class frequencies smaller 
D) To avoid the need for midpoints

Question 16

To summarize the gender of students attending a college,the number of classes in a frequency distribution depends on the number of students.

Accepted Answer

A) True 
 B)False

Question 17

A student was studying the political party preferences of a university's student population.The survey instrument asked students to identify themselves as a democrat or a republican.This question is flawed because:

Accepted Answer

A) Students generally don't know their political preferences. 
B) The categories are generally mutually exclusive. 
C) The categories are not exhaustive. 
D) Political preference is a continuous variable. 
A) Students generally don't know their political preferences. 
B) The categories are generally mutually exclusive. 
C) The categories are not exhaustive. 
D) Political preference is a continuous variable.

Question 18

A pie chart is similar to a relative frequency distribution.

Accepted Answer

A) True 
 B)False

Question 19

When data is collected using a quantitative,ratio variable,what is true about a frequency distribution that summarizes the data?

Accepted Answer

A) Upper and lower class limits must be calculated. 
B) A pie chart can be used to summarize the data. 
C) Number of classes is equal to the number of variable's values. 
D) The "5 to the k rule" can be applied. 
A) Upper and lower class limits must be calculated. 
B) A pie chart can be used to summarize the data. 
C) Number of classes is equal to the number of variable's values. 
D) The "5 to the k rule" can be applied.

Question 20

Refer to the following distribution of ages:   What is the class interval?

Accepted Answer

A) 9 
B) 10 
C) 10.5 
D) 11 
A) 9 
B) 10 
C) 10.5 
D) 11

A relative frequency distribution shows the number of observations in each class.

Draw a bar graph that illustrates the relative frequencies.

For quantitative data,the relative frequency for a class is computed as the

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5". What are the class limits for the third class?

Refer to the following distribution of commissions: What is the class interval?

A frequency distribution for qualitative data shows the number of observations in each class.

For qualitative data,the relative frequency for a class is computed as the

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5". What is the class interval?

A cumulative frequency distribution is used when we want to determine how many observations lie above or below certain values.

To summarize the gender of students attending a college,a frequency distribution groups data into two classes.

When data is collected using a qualitative,nominal variable,i.e. ,male or female,what is true about a frequency distribution that summarizes the data?

To convert a frequency distribution to a relative frequency distribution,divide each class frequency by the sum of the class frequencies.

A sample distribution of hourly earnings in Paul's Cookie Factory is: The limits of the class with the smallest frequency are:

Refer to the following distribution of commissions: The first plot for a cumulative frequency distribution would be:

Why are unequal class intervals sometimes used in a frequency distribution?

To summarize the gender of students attending a college,the number of classes in a frequency distribution depends on the number of students.

A student was studying the political party preferences of a university's student population.The survey instrument asked students to identify themselves as a democrat or a republican.This question is flawed because:

A pie chart is similar to a relative frequency distribution.

When data is collected using a quantitative,ratio variable,what is true about a frequency distribution that summarizes the data?

Refer to the following distribution of ages: What is the class interval?

What Is Statistics

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

Exam 2: Describing Data: Frequency Distributions and Graphic Presentations

A relative frequency distribution shows the number of observations in each class.

Draw a bar graph that illustrates the relative frequencies.

For quantitative data,the relative frequency for a class is computed as the

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5". What are the class limits for the third class?

Refer to the following distribution of commissions: What is the class interval?

A frequency distribution for qualitative data shows the number of observations in each class.

For qualitative data,the relative frequency for a class is computed as the

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5". What is the class interval?

A cumulative frequency distribution is used when we want to determine how many observations lie above or below certain values.

To summarize the gender of students attending a college,a frequency distribution groups data into two classes.

When data is collected using a qualitative,nominal variable,i.e. ,male or female,what is true about a frequency distribution that summarizes the data?

To convert a frequency distribution to a relative frequency distribution,divide each class frequency by the sum of the class frequencies.

A sample distribution of hourly earnings in Paul's Cookie Factory is: The limits of the class with the smallest frequency are:

Refer to the following distribution of commissions: The first plot for a cumulative frequency distribution would be:

Why are unequal class intervals sometimes used in a frequency distribution?

To summarize the gender of students attending a college,the number of classes in a frequency distribution depends on the number of students.

A student was studying the political party preferences of a university's student population.The survey instrument asked students to identify themselves as a democrat or a republican.This question is flawed because:

A pie chart is similar to a relative frequency distribution.

When data is collected using a quantitative,ratio variable,what is true about a frequency distribution that summarizes the data?

Refer to the following distribution of ages: What is the class interval?

What Is Statistics

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters