Question 1

Refer to the following chart showing a distribution of exporting firms:  
-What is the class interval?

Accepted Answer

A)  2 
B)  3 
C)  3.5 
D)  4 
E)  None of the choices are correct 
A)  2 
B)  3 
C)  3.5 
D)  4 
E)  None of the choices are correct

Question 2

Refer to the following distribution of commissions:  
-What is the relative frequency for those salespersons that earn between $1,600 and $1,799?

Accepted Answer

A)  2% 
B)  2.4% 
C)  20% 
D)  24% 
E)  None of the choices are correct 
A)  2% 
B)  2.4% 
C)  20% 
D)  24% 
E)  None of the choices are correct

Question 3

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits:
20 up to 30
30 up to 40
40 up to 50
50 up to 60
60 up to 70.
-The class limits for the class 50 up to 60 class are _________and_______ .

Accepted Answer

The answer of Refer to the following ages (rounded to...

Question 4

In a cumulative frequency distribution,_______ percent of the total frequencies would fall below the upper limit of the highest class.

Accepted Answer

The answer of In a cumulative frequency distribution,_______ percent of...

Question 5

The chart below can be best described as

Accepted Answer

A)  Line chart 
B)  Bar chart 
C)  Clustered bar chart 
D)  Stacked bar chart 
E)  Cumulative stacked bar chart 
A)  Line chart 
B)  Bar chart 
C)  Clustered bar chart 
D)  Stacked bar chart 
E)  Cumulative stacked bar chart

Question 6

The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school:   Before data was collected, someone questioned the validity of this arrangement. Which of the following represents a problem with this set of intervals?

Accepted Answer

A)  there are too many intervals 
B)  the class widths are too small 
C)  some numbers between 18,000 and 30,000 would fall into two different intervals 
D)  the first and the second interval overlap 
E)  None of the choices are correct, there are no problems with the intervals 
A)  there are too many intervals 
B)  the class widths are too small 
C)  some numbers between 18,000 and 30,000 would fall into two different intervals 
D)  the first and the second interval overlap 
E)  None of the choices are correct, there are no problems with the intervals

Question 7

(i) Bar charts are useful for showing the percent that various components compose of the total. (ii) Simple bar charts may be constructed either horizontally or vertically. (iii) A line chart is ideal for showing the trend or sales of income over time.

Accepted Answer

A)  (i), (ii) and (iii) are all correct statements. 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (ii) and, (iii) are correct statements but not (i). 
E)  All statements are false. 
A)  (i), (ii) and (iii) are all correct statements. 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (ii) and, (iii) are correct statements but not (i). 
E)  All statements are false.

Question 8

The grades on a statistics exam for a sample of students are as follows:   If A + = 90%-100% A = 80%-89% B+ = 75%-79% B = 70%-74% C+ = 65%-69% C = 60%-64%
D = 55%-59%
F = 0%-54
What is the most common letter grade earned?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  F 
A)  A 
B)  B 
C)  C 
D)  D 
E)  F

Question 9

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

Accepted Answer

A)  9 
B)  10 
C)  10.5 
D)  11 
E)  None of the choices are correct 
A)  9 
B)  10 
C)  10.5 
D)  11 
E)  None of the choices are correct

Question 10

In constructing a frequency polygon, the class frequencies are scaled on the______axis.

Accepted Answer

The answer of In constructing a frequency polygon, the class...

Question 11

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits:
20 up to 30
30 up to 40
40 up to 50
50 up to 60
60 up to 70.
-IQs were tested for a number of students. The first three IQs are 105, 115, and 125.
The class interval is_____ .

Accepted Answer

The answer of Refer to the following ages (rounded to...

Question 12

The Lake Ontario Credit Union selected a sample of 40 student chequing accounts. Below is a chart of their end-of-the-month balances. The bank considers any student with an ending balance of $400 or more a "preferred customer". Estimate the percentage of preferred customers.

Accepted Answer

A)  50% 
B)  60% 
C)  33% 
D)  67% 40% 
A)  50% 
B)  60% 
C)  33% 
D)  67% 40%

Question 13

What type of graph is this?

Accepted Answer

A)  line chart 
B)  multiple line chart 
C)  bar chart 
D)  stacked bar chart 
E)  cumulative frequency polygon 
A)  line chart 
B)  multiple line chart 
C)  bar chart 
D)  stacked bar chart 
E)  cumulative frequency polygon

Question 14

Refer to the following distribution of commissions:  
-What is the relative frequency for those salespersons that earn between $1,500 and $1,800?

Accepted Answer

A)  2% 
B)  2.4% 
C)  20% 
D)  24% 
E)  Unable to determine without approximation 
A)  2% 
B)  2.4% 
C)  20% 
D)  24% 
E)  Unable to determine without approximation

Question 15

When a class interval is expressed as: 100 to under 200,

Accepted Answer

A)  Observations with values of 100 are excluded from the class frequency. 
B)  Observations with values of 200 are included in the class frequency. 
C)  Observations with values of 200 are excluded from the class frequency. 
D)  The class interval is 99. 
A)  Observations with values of 100 are excluded from the class frequency. 
B)  Observations with values of 200 are included in the class frequency. 
C)  Observations with values of 200 are excluded from the class frequency. 
D)  The class interval is 99.

Question 16

What are the true class limits for the $55 up to $65 class?

Accepted Answer

A)  55 and 64 
B)  54 and 64 
C)  55 and up to 65 
D)  55 and 64.5 
E)  None of the choices are correct 
A)  55 and 64 
B)  54 and 64 
C)  55 and up to 65 
D)  55 and 64.5 
E)  None of the choices are correct

Question 17

Given the following stem and leaf plot, determine the largest value in the data set.

Accepted Answer

A)  87 
B)  819 
C)  28 
D)  17 
E)  817 
A)  87 
B)  819 
C)  28 
D)  17 
E)  817

Question 18

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 
E)  None of the choices are correct 
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 
E)  None of the choices are correct

Question 19

In a simple line chart, where is time plotted?

Accepted Answer

A)  On the X-axis 
B)  On the Y-axis 
C)  On either axis. 
D)  Never plotted 
A)  On the X-axis 
B)  On the Y-axis 
C)  On either axis. 
D)  Never plotted

Question 20

Refer to the following distribution of commissions:  
-One rule that must always be followed in constructing frequency distributions is that .

Accepted Answer

A)  the number of classes must be less than 10 
B)  each data point can only fall into one class 
C)  the width of each class is equal to the range 
D)  the number of intervals must be an odd number 
E)  the class intervals must overlap
Refer to the following chart showing a distribution of exporting firms: 
A)  the number of classes must be less than 10 
B)  each data point can only fall into one class 
C)  the width of each class is equal to the range 
D)  the number of intervals must be an odd number 
E)  the class intervals must overlap
Refer to the following chart showing a distribution of exporting firms:

Refer to the following chart showing a distribution of exporting firms: -What is the class interval?

Refer to the following distribution of commissions: -What is the relative frequency for those salespersons that earn between $1,600 and $1,799?

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70. -The class limits for the class 50 up to 60 class are ___and_ .

In a cumulative frequency distribution,_______ percent of the total frequencies would fall below the upper limit of the highest class.

The chart below can be best described as

(i) Bar charts are useful for showing the percent that various components compose of the total. (ii) Simple bar charts may be constructed either horizontally or vertically. (iii) A line chart is ideal for showing the trend or sales of income over time.

The grades on a statistics exam for a sample of students are as follows: If A + = 90%-100% A = 80%-89% B+ = 75%-79% B = 70%-74% C+ = 65%-69% C = 60%-64% D = 55%-59% F = 0%-54 What is the most common letter grade earned?

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

In constructing a frequency polygon, the class frequencies are scaled on the______axis.

The Lake Ontario Credit Union selected a sample of 40 student chequing accounts. Below is a chart of their end-of-the-month balances. The bank considers any student with an ending balance of $400 or more a "preferred customer". Estimate the percentage of preferred customers.

What type of graph is this?

Refer to the following distribution of commissions: -What is the relative frequency for those salespersons that earn between $1,500 and $1,800?

When a class interval is expressed as: 100 to under 200,

What are the true class limits for the $55 up to $65 class?

Given the following stem and leaf plot, determine the largest value in the data set.

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

In a simple line chart, where is time plotted?

Refer to the following distribution of commissions: -One rule that must always be followed in constructing frequency distributions is that .

What Is Statistics

Describing Data: Numerical Measures

A Survey of Probability Concepts

Discrete Probability Distributions

The Normal Probability Distribution

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of a Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications for Nominal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

Exam 2: Describing Data: Frequency Distributions and Graphic Presentation

Refer to the following chart showing a distribution of exporting firms: -What is the class interval?

Refer to the following distribution of commissions: -What is the relative frequency for those salespersons that earn between $1,600 and $1,799?

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70. -The class limits for the class 50 up to 60 class are _________and_______ .

In a cumulative frequency distribution,_______ percent of the total frequencies would fall below the upper limit of the highest class.

The chart below can be best described as

(i) Bar charts are useful for showing the percent that various components compose of the total. (ii) Simple bar charts may be constructed either horizontally or vertically. (iii) A line chart is ideal for showing the trend or sales of income over time.

The grades on a statistics exam for a sample of students are as follows: If A + = 90%-100% A = 80%-89% B+ = 75%-79% B = 70%-74% C+ = 65%-69% C = 60%-64% D = 55%-59% F = 0%-54 What is the most common letter grade earned?

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

In constructing a frequency polygon, the class frequencies are scaled on the______axis.

The Lake Ontario Credit Union selected a sample of 40 student chequing accounts. Below is a chart of their end-of-the-month balances. The bank considers any student with an ending balance of $400 or more a "preferred customer". Estimate the percentage of preferred customers.

What type of graph is this?

Refer to the following distribution of commissions: -What is the relative frequency for those salespersons that earn between $1,500 and $1,800?

When a class interval is expressed as: 100 to under 200,

What are the true class limits for the $55 up to $65 class?

Given the following stem and leaf plot, determine the largest value in the data set.

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

In a simple line chart, where is time plotted?

Refer to the following distribution of commissions: -One rule that must always be followed in constructing frequency distributions is that .

What Is Statistics

Describing Data: Numerical Measures

A Survey of Probability Concepts

Discrete Probability Distributions

The Normal Probability Distribution

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of a Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications for Nominal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70. -The class limits for the class 50 up to 60 class are ___and_ .