Question 1

The accompanying table shows students' scores from the final exam in a history course.   How many of the students scored at least 70 but less than 90?

Accepted Answer

A) 24 
B) 31 
C) 55 
D) 88 
A) 24 
B) 31 
C) 55 
D) 88

Question 2

Exhibit 2-8.Consider the following frequency distribution.   Refer to Exhibit 2-8.How many observations are less than 21?

Accepted Answer

A) 6 
B) 12 
C) 18 
D) 24 
A) 6 
B) 12 
C) 18 
D) 24

Question 3

Frequency distributions may be used to describe which of the following types of data?

Accepted Answer

A) Nominal and ordinal data only 
B) Nominal and interval data only 
C) Nominal,ordinal,and interval data only 
D) Nominal,ordinal,interval,and ratio data 
A) Nominal and ordinal data only 
B) Nominal and interval data only 
C) Nominal,ordinal,and interval data only 
D) Nominal,ordinal,interval,and ratio data

Question 4

The percent frequency of a category equals the frequency of the category multiplied by 100%.

Accepted Answer

A) True 
 B)False

Question 5

When displaying quantitative data,what is an ogive used to plot?

Accepted Answer

A) Frequency or relative frequency of each class against the midpoint of the corresponding class 
B) Cumulative frequency or cumulative relative frequency of each class against the upper limit of the corresponding class 
C) A and B 
D) None of the above 
A) Frequency or relative frequency of each class against the midpoint of the corresponding class 
B) Cumulative frequency or cumulative relative frequency of each class against the upper limit of the corresponding class 
C) A and B 
D) None of the above

Question 6

Exhibit 2-7.Thirty students at Eastside High School took the SAT on the same Saturday.Their raw scores are given next.   Refer to Exhibit 2-7.Consider a frequency distribution of the data that groups the data in classes of 1400 up to 1600,1600 up to 1800,1800 up to 2000,and so on.How many students scored at least 1800 but less than 2000?

Accepted Answer

A) 3 
B) 7 
C) 12 
D) 18 
A) 3 
B) 7 
C) 12 
D) 18

Question 7

For quantitative data,a cumulative frequency distribution records the number of observations that fall below the upper limit of each class.

Accepted Answer

A) True 
 B)False

Question 8

A frequency distribution for qualitative data groups this data into classes called intervals and records the total number of observations in each class.

Accepted Answer

A) True 
 B)False

Question 9

Construct a stem-and-leaf diagram with the following data set:   Is the distribution symmetric?

Accepted Answer

@#IMG-DLM& No,the di

Question 10

Exhibit 2-9.An analyst constructed the following frequency distribution on the monthly returns for 50 selected stocks:   Refer to Exhibit 2-9.The number of stocks with returns of less than 10% is _____.

Accepted Answer

A) 8 
B) 25 
C) 33 
D) 48 
A) 8 
B) 25 
C) 33 
D) 48

Question 11

Exhibit 2-14.In the accompanying stem-and-leaf diagram,the values in the stem and leaf portions represent 10s and 1s digits,respectively.   Refer to Exhibit 2-14.Find the frequency associated with data values that are more than 28.

Accepted Answer

A) 8 
B) 9 
C) 10 
D) 11 
A) 8 
B) 9 
C) 10 
D) 11

Question 12

Exhibit 2-10.Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar system.The following table is a frequency distribution of speeds.   Refer to Exhibit 2-10.When using a polygon to graph quantitative data,what does each point represent?

Accepted Answer

A) The lower limit of a particular class and its width 
B) The midpoint of a particular class and its associated frequency or relative frequency 
C) The midpoint of a particular class and its associated cumulative frequency or cumulative relative frequency 
D) The upper limit of a particular class and its associated cumulative frequency or cumulative relative frequency 
A) The lower limit of a particular class and its width 
B) The midpoint of a particular class and its associated frequency or relative frequency 
C) The midpoint of a particular class and its associated cumulative frequency or cumulative relative frequency 
D) The upper limit of a particular class and its associated cumulative frequency or cumulative relative frequency

Question 13

Exhibit 2-3.A city in California spent six million dollars repairing damage to its public buildings in 2010.The following table shows the categories where the money was directed.   Refer to Exhibit 2-3.How much more did the city spend to fix damage caused by termites compared to the damage caused by water?

Accepted Answer

A) $360,000 
B) $720,000 
C) $960,000 
D) $1,320,000 
A) $360,000 
B) $720,000 
C) $960,000 
D) $1,320,000

Question 14

Exhibit 2-7.Thirty students at Eastside High School took the SAT on the same Saturday.Their raw scores are given next.   Refer to Exhibit 2-7.Consider a frequency distribution of the data that groups the data in classes of 1400 up to 1600,1600 up to 1800,1800 up to 2000,and so on.What is the approximate relative frequency of students who scored more than 1600 but less than 1800?

Accepted Answer

A) 0.17 
B) 0.23 
C) 0.40 
D) 0.77 
A) 0.17 
B) 0.23 
C) 0.40 
D) 0.77

Question 15

When constructing a frequency distribution for quantitative data,it is important to remember that ____________.

Accepted Answer

A) Classes are mutually exclusive 
B) Classes are collectively exhaustive 
C) The total number of classes usually ranges from 5 to 20 
D) All of the above 
A) Classes are mutually exclusive 
B) Classes are collectively exhaustive 
C) The total number of classes usually ranges from 5 to 20 
D) All of the above

Question 16

The accompanying cumulative relative frequency distribution shows a summary of the scores from an Algebra II exam at a local high school.Twenty students took the exam.   a.Construct the relative frequency distribution.What proportion of students scored between 81 and 90?
B)Construct the frequency distribution.How many students scored between 71 and 80?
C)Construct an ogive.What is the approximate percentage of students that scored less than 85?

Accepted Answer

a.See accompanying table;0.35

Question 17

Exhibit 2-1.An auto parts chain asked customers to complete a survey rating the chain's customer service as average,above average,or below average.The following shows the results from the survey:   Refer to Exhibit 2-1.The proportion of customers that felt the customer service was average is closest to ______.

Accepted Answer

A) 0.20 
B) 0.33 
C) 0.46 
D) 0.53 
A) 0.20 
B) 0.33 
C) 0.46 
D) 0.53

Question 18

Exhibit 2-13.The organization of the Girl Sprouts has completed its annual cookie drive.The sales are reported in the accompanying ogive.   Refer to Exhibit 2-13.Approximate the percentage of girls who sold more than 70 boxes of cookies.

Accepted Answer

A) 45% 
B) 55% 
C) 65% 
D) 75% 
A) 45% 
B) 55% 
C) 65% 
D) 75%

Question 19

Use the following data to construct a scatterplot.What type of relationship is implied?

Accepted Answer

A) No relationship 
B) A positive relationship 
C) A negative relationship 
D) Not enough information to answer 
A) No relationship 
B) A positive relationship 
C) A negative relationship 
D) Not enough information to answer

The accompanying table shows students' scores from the final exam in a history course. How many of the students scored at least 70 but less than 90?

Exhibit 2-8.Consider the following frequency distribution. Refer to Exhibit 2-8.How many observations are less than 21?

Frequency distributions may be used to describe which of the following types of data?

The percent frequency of a category equals the frequency of the category multiplied by 100%.

When displaying quantitative data,what is an ogive used to plot?

For quantitative data,a cumulative frequency distribution records the number of observations that fall below the upper limit of each class.

A frequency distribution for qualitative data groups this data into classes called intervals and records the total number of observations in each class.

Construct a stem-and-leaf diagram with the following data set: Is the distribution symmetric?

Exhibit 2-9.An analyst constructed the following frequency distribution on the monthly returns for 50 selected stocks: Refer to Exhibit 2-9.The number of stocks with returns of less than 10% is _____.

Exhibit 2-14.In the accompanying stem-and-leaf diagram,the values in the stem and leaf portions represent 10s and 1s digits,respectively. Refer to Exhibit 2-14.Find the frequency associated with data values that are more than 28.

When constructing a frequency distribution for quantitative data,it is important to remember that ____________.

Exhibit 2-13.The organization of the Girl Sprouts has completed its annual cookie drive.The sales are reported in the accompanying ogive. Refer to Exhibit 2-13.Approximate the percentage of girls who sold more than 70 boxes of cookies.

Use the following data to construct a scatterplot.What type of relationship is implied?

Statistics and Data

Numerical Descriptive Measures

Basic Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Testing

Statistical Inference Concerning Two Populations

Statistical Inference Concerning Variance

Chi-Square Tests

Analysis of Variance

Regression Analysis

Inference With Regression Models

Regression Models for Nonlinear Relationships

Regression Models With Dummy Variables

Time Series and Forecasting

Returns, Index Numbers and Inflation

Nonparametric Tests

Filters

Exam 2: Tabular and Graphical Methods

The accompanying table shows students' scores from the final exam in a history course. How many of the students scored at least 70 but less than 90?

Exhibit 2-8.Consider the following frequency distribution. Refer to Exhibit 2-8.How many observations are less than 21?

Frequency distributions may be used to describe which of the following types of data?

The percent frequency of a category equals the frequency of the category multiplied by 100%.

When displaying quantitative data,what is an ogive used to plot?

For quantitative data,a cumulative frequency distribution records the number of observations that fall below the upper limit of each class.

A frequency distribution for qualitative data groups this data into classes called intervals and records the total number of observations in each class.

Construct a stem-and-leaf diagram with the following data set: Is the distribution symmetric?

Exhibit 2-9.An analyst constructed the following frequency distribution on the monthly returns for 50 selected stocks: Refer to Exhibit 2-9.The number of stocks with returns of less than 10% is _____.

Exhibit 2-14.In the accompanying stem-and-leaf diagram,the values in the stem and leaf portions represent 10s and 1s digits,respectively. Refer to Exhibit 2-14.Find the frequency associated with data values that are more than 28.

When constructing a frequency distribution for quantitative data,it is important to remember that ____________.

Exhibit 2-13.The organization of the Girl Sprouts has completed its annual cookie drive.The sales are reported in the accompanying ogive. Refer to Exhibit 2-13.Approximate the percentage of girls who sold more than 70 boxes of cookies.

Use the following data to construct a scatterplot.What type of relationship is implied?

Statistics and Data

Numerical Descriptive Measures

Basic Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Testing

Statistical Inference Concerning Two Populations

Statistical Inference Concerning Variance

Chi-Square Tests

Analysis of Variance

Regression Analysis

Inference With Regression Models

Regression Models for Nonlinear Relationships

Regression Models With Dummy Variables

Time Series and Forecasting

Returns, Index Numbers and Inflation

Nonparametric Tests

Filters