Question 1

Which of the following is an impossible value for a percentage?

Accepted Answer

A) 0.0% 
B) 47.458923% 
C) 110.00% 
D) 0.05% 
A) 0.0% 
B) 47.458923% 
C) 110.00% 
D) 0.05%

Question 2

You are the Dean of students at a college and the President has asked for some information about how the student body has changed over the years.You have collected the following information regarding the number of students in various categories for two different graduating classes:
 $\begin{array}{|l|l|l|}
\hline  \text {CHARACTERISTICS OF TWO GRADUATING  }\
 \text {   CLASSES }\
\hline &\underline{1987}&\underline{2007}\
\hline \text { Total in class } & 345 & 687 \
\hline \text { Females } & 178 & 301 \
\hline \text { Married } & 48 & 117 \
\hline \text { Humanities Majors } & 115 & 258 \
\hline \text { Going to Graduate School } & 78 & 159 \
\hline \text { Attended Commencement } & 99 & 458 \
\hline \text { Finished in 4 years } & 269 & 325 \
\hline \text { Received financial aid } & 159 & 369 \
\hline
\end{array}$

Accepted Answer

What will you say to the president when

Question 3

As a very general rule,frequency distributions should have ____ categories.

Accepted Answer

A) less than 5 
B) more than 20 
C) no more than 5 
D) about 10 
A) less than 5 
B) more than 20 
C) no more than 5 
D) about 10

Question 4

A police department reports that the number of reported rapes in their jurisdiction increased by 100% over the past decade.This means that the number of reported rapes today is

Accepted Answer

A) double the number 10 years ago. 
B) actually about the same as 10 years ago. 
C) equal to the number 10 years ago plus 50%. 
D) triple the number 10 years ago. 
A) double the number 10 years ago. 
B) actually about the same as 10 years ago. 
C) equal to the number 10 years ago plus 50%. 
D) triple the number 10 years ago.

Question 5

$\begin{array}{|l|l|l|}
\hline\text {TABLE 2.2 AGES OF  }\
\text {RESPONDENTS  }\
\hline \text { Class Intervals } & \text { Frequency } & \text { Percentages } \
\hline 18-23 & 5 & \
\hline 24-29 & 21 & \
\hline 30-40 & 10 & \
\hline \text { TOTAL } & 36 & \
\hline
\end{array}$
In Table 2.2,what percentage of cases is in the 18-23 age group?

Accepted Answer

A) (5/36)´ 100 = 13.51% 
B) (18/23)´ 100 = 78.26% 
C) (36/5)´ 100 = 7.4% 
D) (5/21)´ 100 = 23.81% 
A) (5/36)´ 100 = 13.51% 
B) (18/23)´ 100 = 78.26% 
C) (36/5)´ 100 = 7.4% 
D) (5/21)´ 100 = 23.81%

Question 6

The class intervals below represent ages of respondents.Which set of intervals is both exhaustive and mutually exclusive?

Accepted Answer

A) 18-19
19-20
20-21 
B) 18-19
20-21
22-23 
C) 18-20
22-24
26-28 
D) 18-19
21-22
24-25 
A) 18-19
19-20
20-21 
B) 18-19
20-21
22-23 
C) 18-20
22-24
26-28 
D) 18-19
21-22
24-25

Question 7

When working with a very small number of cases,it is usually preferable to report

Accepted Answer

A) percentages. 
B) proportions. 
C) fractions. 
D) actual frequencies. 
A) percentages. 
B) proportions. 
C) fractions. 
D) actual frequencies.

Question 8

City A (population = 1567 people)had 34 auto thefts last year.City B (population = 34,567)had 40 auto thefts in the same time period and City C (population = 156,980)had 70 auto thefts.Which city had the highest RATE of auto theft?

Accepted Answer

A) City A 
B) City B 
C) City C 
D) More information is needed to answer this question. 
A) City A 
B) City B 
C) City C 
D) More information is needed to answer this question.

Question 9

To find the ratio of smokers to non-smokers,you would

Accepted Answer

A) divide the number of non-smokers by the number of smokers. 
B) add them together and divide by the number of smokers. 
C) divide the number of smokers by the number of non-smokers. 
D) multiply the number of smokers by the total number of people. 
A) divide the number of non-smokers by the number of smokers. 
B) add them together and divide by the number of smokers. 
C) divide the number of smokers by the number of non-smokers. 
D) multiply the number of smokers by the total number of people.

Question 10

$\begin{array}{|l|l|l|}
\hline \text {TABLE  2.1 POLITICAL PARTY  } \
\text {MEMBERSHIP IN TWO  } \
\text { COMMUNITIES } \
\hline \text { PARTY: } & \text { COMMUNITYA } & \text { COMMUUNITY B } \
\hline \text { Republican } & 103 & 17 \
\hline \text { Democrat } & 135 & 21 \
\hline \text { Independent } & 17 & 15 \
\hline \text { Socialist } & 9 & 11 \
\hline \text { TOTALS: } & 264 & 154 \
\hline
\end{array}$
In Table 2.1,what percentage of Community A are Republicans?

Accepted Answer

A) (103/264)´ 100 = 39.02 
B) (103/17)´ 100 = 605.88 
C) (264/328)´ 100 = 80.49 
D) (103/135)´ 100 = 76.30 
A) (103/264)´ 100 = 39.02 
B) (103/17)´ 100 = 605.88 
C) (264/328)´ 100 = 80.49 
D) (103/135)´ 100 = 76.30

Question 11

$\begin{array}{|l|l|l|}
\hline\text {TABLE 2.2 AGES OF  }\
\text {RESPONDENTS  }\
\hline \text { Class Intervals } & \text { Frequency } & \text { Percentages } \
\hline 18-23 & 5 & \
\hline 24-29 & 21 & \
\hline 30-40 & 10 & \
\hline \text { TOTAL } & 36 & \
\hline
\end{array}$
In Table 2.2,what is the ratio of 30-40 year olds to 18-23 year olds?

Accepted Answer

A) .24 
B) 4.20 
C) 2.00 
D) 1.00 
A) .24 
B) 4.20 
C) 2.00 
D) 1.00

Question 12

The purpose of univariate descriptive statistics is to

Accepted Answer

A) summarize relationships between many variables. 
B) display the essential meaning of variables measured at the interval-ratio level. 
C) combine nominal and discrete variables. 
D) summarize a single variable. 
A) summarize relationships between many variables. 
B) display the essential meaning of variables measured at the interval-ratio level. 
C) combine nominal and discrete variables. 
D) summarize a single variable.

Question 13

Open-ended intervals

Accepted Answer

A) are always preferable to unequal intervals. 
B) should never be used in actual research. 
C) can be useful when there are a few very high or very low scores in a distribution. 
D) should only be used with ordinal-level variables. 
A) are always preferable to unequal intervals. 
B) should never be used in actual research. 
C) can be useful when there are a few very high or very low scores in a distribution. 
D) should only be used with ordinal-level variables.

Question 14

A possible problem with open-ended or unequal intervals is that they

Accepted Answer

A) do not permit the computation of midpoints. 
B) are useful only for nominal-level variables. 
C) can be used only with variables that have few scores. 
D) cannot be used for interval-ratio level variables. 
A) do not permit the computation of midpoints. 
B) are useful only for nominal-level variables. 
C) can be used only with variables that have few scores. 
D) cannot be used for interval-ratio level variables.

Question 15

To be converted to a percentage,the proportion must be multiplied by

Accepted Answer

A) 10. 
B) 100. 
C) 1000. 
D) any of these 
A) 10. 
B) 100. 
C) 1000. 
D) any of these

Question 16

When constructing a frequency distribution,the number of class intervals,in general,should be

Accepted Answer

A) more than 20. 
B) about 10. 
C) only 2. 
D) the same as the number of cases. 
A) more than 20. 
B) about 10. 
C) only 2. 
D) the same as the number of cases.

Question 17

If 60 cases range in score from 4 to 84 and you want 10 intervals in a frequency distribution,approximately what will be the width of each interval?

Accepted Answer

A) 4 
B) 8 
C) 12 
D) 60 
A) 4 
B) 8 
C) 12 
D) 60

Question 18

To calculate a proportion,the number of cases in any category (f)is divided by

Accepted Answer

A) the total number of categories (k). 
B) the number of cases in all categories (N). 
C) the cases in that category (f). 
D) the number of cases in adjacent categories (k-1). 
A) the total number of categories (k). 
B) the number of cases in all categories (N). 
C) the cases in that category (f). 
D) the number of cases in adjacent categories (k-1).

Question 19

$\begin{array}{|l|l|l|}
\hline \text {TABLE  2.1 POLITICAL PARTY  } \
\text {MEMBERSHIP IN TWO  } \
\text { COMMUNITIES } \
\hline \text { PARTY: } & \text { COMMUNITYA } & \text { COMMUUNITY B } \
\hline \text { Republican } & 103 & 17 \
\hline \text { Democrat } & 135 & 21 \
\hline \text { Independent } & 17 & 15 \
\hline \text { Socialist } & 9 & 11 \
\hline \text { TOTALS: } & 264 & 154 \
\hline
\end{array}$
In Table 2.1,what percentage of Democrats lives in community B?

Accepted Answer

A) (21 / 64)´ 100 = 32.8 
B) (21/328)´ 100 = 6.4 
C) (21/156)´ 100 = 13.5 
D) (64/264)´ 100 = 24.2 
A) (21 / 64)´ 100 = 32.8 
B) (21/328)´ 100 = 6.4 
C) (21/156)´ 100 = 13.5 
D) (64/264)´ 100 = 24.2

Question 20

$\begin{array}{|l|l|l|}
\hline \text {TABLE  2.1 POLITICAL PARTY  } \
\text {MEMBERSHIP IN TWO  } \
\text { COMMUNITIES } \
\hline \text { PARTY: } & \text { COMMUNITYA } & \text { COMMUUNITY B } \
\hline \text { Republican } & 103 & 17 \
\hline \text { Democrat } & 135 & 21 \
\hline \text { Independent } & 17 & 15 \
\hline \text { Socialist } & 9 & 11 \
\hline \text { TOTALS: } & 264 & 154 \
\hline
\end{array}$
In Table 2.1,what is the ratio of Independents to Socialists in Community A?

Accepted Answer

A) 15:11 
B) 17:9 
C) 9:17 
D) 17:264 
A) 15:11 
B) 17:9 
C) 9:17 
D) 17:264

Which of the following is an impossible value for a percentage?

As a very general rule,frequency distributions should have ____ categories.

A police department reports that the number of reported rapes in their jurisdiction increased by 100% over the past decade.This means that the number of reported rapes today is

TABLE 2.2 AGES OF RESPONDENTS Class Intervals Frequency Percentages 18-23 5 24-29 21 30-40 10 TOTAL 36 In Table 2.2,what percentage of cases is in the 18-23 age group?

The class intervals below represent ages of respondents.Which set of intervals is both exhaustive and mutually exclusive?

When working with a very small number of cases,it is usually preferable to report

City A (population = 1567 people)had 34 auto thefts last year.City B (population = 34,567)had 40 auto thefts in the same time period and City C (population = 156,980)had 70 auto thefts.Which city had the highest RATE of auto theft?

To find the ratio of smokers to non-smokers,you would

TABLE 2.1 POLITICAL PARTY MEMBERSHIP IN TWO COMMUNITIES PARTY: COMMUNITYA COMMUUNITY B Republican 103 17 Democrat 135 21 Independent 17 15 Socialist 9 11 TOTALS: 264 154 In Table 2.1,what percentage of Community A are Republicans?

TABLE 2.2 AGES OF RESPONDENTS Class Intervals Frequency Percentages 18-23 5 24-29 21 30-40 10 TOTAL 36 In Table 2.2,what is the ratio of 30-40 year olds to 18-23 year olds?

The purpose of univariate descriptive statistics is to

Open-ended intervals

A possible problem with open-ended or unequal intervals is that they

To be converted to a percentage,the proportion must be multiplied by

When constructing a frequency distribution,the number of class intervals,in general,should be

If 60 cases range in score from 4 to 84 and you want 10 intervals in a frequency distribution,approximately what will be the width of each interval?

To calculate a proportion,the number of cases in any category (f)is divided by

TABLE 2.1 POLITICAL PARTY MEMBERSHIP IN TWO COMMUNITIES PARTY: COMMUNITYA COMMUUNITY B Republican 103 17 Democrat 135 21 Independent 17 15 Socialist 9 11 TOTALS: 264 154 In Table 2.1,what percentage of Democrats lives in community B?

TABLE 2.1 POLITICAL PARTY MEMBERSHIP IN TWO COMMUNITIES PARTY: COMMUNITYA COMMUUNITY B Republican 103 17 Democrat 135 21 Independent 17 15 Socialist 9 11 TOTALS: 264 154 In Table 2.1,what is the ratio of Independents to Socialists in Community A?

Introduction

Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction in Inferential Statistics, the Sampling Distribution, and Estimation

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Introduction to Bivariate Association and Measures of Association for Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 2: Basic Descriptive Statistics: Percentages Ratios and Rates Frequency Distributions

Which of the following is an impossible value for a percentage?

As a very general rule,frequency distributions should have ____ categories.

A police department reports that the number of reported rapes in their jurisdiction increased by 100% over the past decade.This means that the number of reported rapes today is

TABLE 2.2 AGES OF RESPONDENTS Class Intervals Frequency Percentages 18-23 5 24-29 21 30-40 10 TOTAL 36 In Table 2.2,what percentage of cases is in the 18-23 age group?

The class intervals below represent ages of respondents.Which set of intervals is both exhaustive and mutually exclusive?

When working with a very small number of cases,it is usually preferable to report

City A (population = 1567 people)had 34 auto thefts last year.City B (population = 34,567)had 40 auto thefts in the same time period and City C (population = 156,980)had 70 auto thefts.Which city had the highest RATE of auto theft?

To find the ratio of smokers to non-smokers,you would

TABLE 2.1 POLITICAL PARTY MEMBERSHIP IN TWO COMMUNITIES PARTY: COMMUNITYA COMMUUNITY B Republican 103 17 Democrat 135 21 Independent 17 15 Socialist 9 11 TOTALS: 264 154 In Table 2.1,what percentage of Community A are Republicans?

TABLE 2.2 AGES OF RESPONDENTS Class Intervals Frequency Percentages 18-23 5 24-29 21 30-40 10 TOTAL 36 In Table 2.2,what is the ratio of 30-40 year olds to 18-23 year olds?

The purpose of univariate descriptive statistics is to

Open-ended intervals

A possible problem with open-ended or unequal intervals is that they

To be converted to a percentage,the proportion must be multiplied by

When constructing a frequency distribution,the number of class intervals,in general,should be

If 60 cases range in score from 4 to 84 and you want 10 intervals in a frequency distribution,approximately what will be the width of each interval?

To calculate a proportion,the number of cases in any category (f)is divided by

TABLE 2.1 POLITICAL PARTY MEMBERSHIP IN TWO COMMUNITIES PARTY: COMMUNITYA COMMUUNITY B Republican 103 17 Democrat 135 21 Independent 17 15 Socialist 9 11 TOTALS: 264 154 In Table 2.1,what percentage of Democrats lives in community B?

TABLE 2.1 POLITICAL PARTY MEMBERSHIP IN TWO COMMUNITIES PARTY: COMMUNITYA COMMUUNITY B Republican 103 17 Democrat 135 21 Independent 17 15 Socialist 9 11 TOTALS: 264 154 In Table 2.1,what is the ratio of Independents to Socialists in Community A?

Introduction

Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction in Inferential Statistics, the Sampling Distribution, and Estimation

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Introduction to Bivariate Association and Measures of Association for Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and Multiple Regression and Correlation

Filters