Question 1

Consider the following frequency distribution: Class Interval Frequency
100-under 200 25
200-under 300 45
300-under 400 30
What is the midpoint of the first class?

Accepted Answer

A) 100 
B) 150 
C) 25 
D) 250 
E) 200 
A) 100 
B) 150 
C) 25 
D) 250 
E) 200

Question 2

Sales are tracked during the past year in the graph below.   Management is pleased to see the growth in sales at the end of the year.Why would this be an incorrect conclusion?

Accepted Answer

A) The highest growth was in the month of June 
B) Cannot compare sales for different time periods 
C) The graph is not showing growth rates 
D) A bar graph would be more effective in determining that conclusion 
E) A second year of data would be needed to make that conclusion 
A) The highest growth was in the month of June 
B) Cannot compare sales for different time periods 
C) The graph is not showing growth rates 
D) A bar graph would be more effective in determining that conclusion 
E) A second year of data would be needed to make that conclusion

Question 3

The staff of Mr.Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a frequency histogram of waiting time for walk-in customers.   Approximately ___ walk-in customers waited at least 7 minutes.

Accepted Answer

A) 20 
B) 30 
C) 100 
D) 180 
E) 200 
A) 20 
B) 30 
C) 100 
D) 180 
E) 200

Question 4

One rule that must always be followed in constructing frequency distributions is that the adjacent classes must overlap.

Accepted Answer

A) True 
 B)False

Question 5

A cross tabulation is a graph that separately displays the frequency counts for two variables.

Accepted Answer

A) True 
 B)False

Question 6

Consider the following stem and leaf plot: Stem Leaf
1 0, 2, 5, 7
2 2, 3, 4, 8
3 0, 4, 6, 6, 9
4 5, 8, 8, 9
5 2, 7, 8
Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.).What was the lowest number in the data set?

Accepted Answer

A) 0 
B) 10 
C) 7 
D) 2 
E) 1 
A) 0 
B) 10 
C) 7 
D) 2 
E) 1

Question 7

The following represent the ages of students in a class: 19, 23, 21, 19, 19, 20, 22, 31, 21, 20
If a stem and leaf plot were to be developed from this, how many stems would there be?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 10 
A) 2 
B) 3 
C) 4 
D) 5 
E) 10

Question 8

A shirt production company has tracked their production since the company started in 1999.The graph of their annual production is shown.   During these years, production has generally _______________.

Accepted Answer

A) increased in these years. 
B) declined in most of the years shown. 
C) increased in every year since 1999. 
D) decreased in most of those years. 
E) increased and declined without a discernable trend. 
A) increased in these years. 
B) declined in most of the years shown. 
C) increased in every year since 1999. 
D) decreased in most of those years. 
E) increased and declined without a discernable trend.

Question 9

To compare two series of data during the same time period, the graph should show the first and then show the second after that, all in one line.

Accepted Answer

A) True 
 B)False

Question 10

A person has decided to construct a frequency distribution for a set of data containing 60 numbers.The lowest number is 23 and the highest number is 68.If 5 classes are used, the class width should be approximately ___.

Accepted Answer

A) 4 
B) 12 
C) 8 
D) 5 
E) 9 
A) 4 
B) 12 
C) 8 
D) 5 
E) 9

Question 11

Consider the following stem and leaf plot: Stem Leaf
1 0, 2, 5, 7
2 2, 3, 4, 8
3 0, 4, 6, 6, 9
4 5, 8, 8, 9
5 2, 7, 8
Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.).What is the cumulative frequency for the 30-under 40 class interval?

Accepted Answer

A) 5 
B) 9 
C) 13 
D) 14 
E) 18 
A) 5 
B) 9 
C) 13 
D) 14 
E) 18

Question 12

Consider the relative frequency distribution given below: Class Interval Relative Frequency
20-under 40 0.2
40-under 60 0.3
60-under 80 0.4
80-under 100 0.1
There were 60 numbers in the data set.How many numbers were in the interval 20-under 40?

Accepted Answer

A) 12 
B) 20 
C) 40 
D) 10 
E) 15 
A) 12 
B) 20 
C) 40 
D) 10 
E) 15

Question 13

Consider the following frequency distribution: Class Interval Frequency
10-under 20 15
20-under 30 25
30-under 40 10
What is the cumulative frequency of the second class interval?

Accepted Answer

A) 25 
B) 40 
C) 15 
D) 50 
A) 25 
B) 40 
C) 15 
D) 50

Question 14

Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions.Saturday's cumulative frequency ogive follows:   The total number of sales transactions on Saturday was ___.

Accepted Answer

A) 200 
B) 500 
C) 300 
D) 100 
E) 400 
A) 200 
B) 500 
C) 300 
D) 100 
E) 400

Consider the following frequency distribution: Class Interval Frequency 100-under 200 25 200-under 300 45 300-under 400 30 What is the midpoint of the first class?

Sales are tracked during the past year in the graph below. Management is pleased to see the growth in sales at the end of the year.Why would this be an incorrect conclusion?

The staff of Mr.Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a frequency histogram of waiting time for walk-in customers. Approximately ___ walk-in customers waited at least 7 minutes.

One rule that must always be followed in constructing frequency distributions is that the adjacent classes must overlap.

A cross tabulation is a graph that separately displays the frequency counts for two variables.

Consider the following stem and leaf plot: Stem Leaf 1 0, 2, 5, 7 2 2, 3, 4, 8 3 0, 4, 6, 6, 9 4 5, 8, 8, 9 5 2, 7, 8 Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.).What was the lowest number in the data set?

The following represent the ages of students in a class: 19, 23, 21, 19, 19, 20, 22, 31, 21, 20 If a stem and leaf plot were to be developed from this, how many stems would there be?

A shirt production company has tracked their production since the company started in 1999.The graph of their annual production is shown. During these years, production has generally _______________.

To compare two series of data during the same time period, the graph should show the first and then show the second after that, all in one line.

A person has decided to construct a frequency distribution for a set of data containing 60 numbers.The lowest number is 23 and the highest number is 68.If 5 classes are used, the class width should be approximately ___.

Consider the relative frequency distribution given below: Class Interval Relative Frequency 20-under 40 0.2 40-under 60 0.3 60-under 80 0.4 80-under 100 0.1 There were 60 numbers in the data set.How many numbers were in the interval 20-under 40?

Consider the following frequency distribution: Class Interval Frequency 10-under 20 15 20-under 30 25 30-under 40 10 What is the cumulative frequency of the second class interval?

Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions.Saturday's cumulative frequency ogive follows: The total number of sales transactions on Saturday was ___.

Introduction to Statistics

Descriptive Statistics

Probability

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters

Exam 2: Charts and Graphs

Consider the following frequency distribution: Class Interval Frequency 100-under 200 25 200-under 300 45 300-under 400 30 What is the midpoint of the first class?

Sales are tracked during the past year in the graph below. Management is pleased to see the growth in sales at the end of the year.Why would this be an incorrect conclusion?

The staff of Mr.Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a frequency histogram of waiting time for walk-in customers. Approximately ___ walk-in customers waited at least 7 minutes.

One rule that must always be followed in constructing frequency distributions is that the adjacent classes must overlap.

A cross tabulation is a graph that separately displays the frequency counts for two variables.

Consider the following stem and leaf plot: Stem Leaf 1 0, 2, 5, 7 2 2, 3, 4, 8 3 0, 4, 6, 6, 9 4 5, 8, 8, 9 5 2, 7, 8 Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.).What was the lowest number in the data set?

The following represent the ages of students in a class: 19, 23, 21, 19, 19, 20, 22, 31, 21, 20 If a stem and leaf plot were to be developed from this, how many stems would there be?

A shirt production company has tracked their production since the company started in 1999.The graph of their annual production is shown. During these years, production has generally _______________.

To compare two series of data during the same time period, the graph should show the first and then show the second after that, all in one line.

A person has decided to construct a frequency distribution for a set of data containing 60 numbers.The lowest number is 23 and the highest number is 68.If 5 classes are used, the class width should be approximately ___.

Consider the relative frequency distribution given below: Class Interval Relative Frequency 20-under 40 0.2 40-under 60 0.3 60-under 80 0.4 80-under 100 0.1 There were 60 numbers in the data set.How many numbers were in the interval 20-under 40?

Consider the following frequency distribution: Class Interval Frequency 10-under 20 15 20-under 30 25 30-under 40 10 What is the cumulative frequency of the second class interval?

Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions.Saturday's cumulative frequency ogive follows: The total number of sales transactions on Saturday was ___.

Introduction to Statistics

Descriptive Statistics

Probability

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters