Question 1

The ratio of men to women in a karate class is 3.3:1.If there are 100 women,how many men are there?

Accepted Answer

A) 33 
B) 66 
C) 133 
D) 330 
A) 33 
B) 66 
C) 133 
D) 330 D

Question 2

$\begin{array}{|l|l|l|}
\hline\text {TABLE 2.2 AGES OF  }\
\text {RESPONDENTS  }\
\hline \text { Class Intervals } & \text { Frequency } & \text { Percentages } \
\hline 18-23 & 5 & \
\hline 24-29 & 21 & \
\hline 30-40 & 10 & \
\hline \text { TOTAL } & 36 & \
\hline
\end{array}$
A possible problem with Table 2.2 is that

Accepted Answer

A) class intervals overlap. 
B) class intervals are too large. 
C) class intervals are unequal in size. 
D) class intervals are exhaustive. 
A) class intervals overlap. 
B) class intervals are too large. 
C) class intervals are unequal in size. 
D) class intervals are exhaustive. C

Question 3

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

Accepted Answer

A) 0.05 
B) 0.36 
C) 0.78 
D) 0.13 
A) 0.05 
B) 0.36 
C) 0.78 
D) 0.13 D

Question 4

A frequency distribution should reflect a balance of

Accepted Answer

A) detail and conciseness. 
B) time and money. 
C) questions and answers. 
D) elegance and symmetry. 
A) detail and conciseness. 
B) time and money. 
C) questions and answers. 
D) elegance and symmetry.

Question 5

$\begin{array}{|l|l|l|}
\hline \text {TABLE  2.1 POLITICAL PARTY  } \
\text {MEMBERSHIP IN TWO  } \
\text { COMMUNITIES } \
\hline \text { PARTY: } & \text { COMMUNITYA } & \text { COMMUUNITY B } \
\hline \text { Republican } & 103 & 17 \
\hline \text { Democrat } & 135 & 21 \
\hline \text { Independent } & 17 & 15 \
\hline \text { Socialist } & 9 & 11 \
\hline \text { TOTALS: } & 264 & 154 \
\hline
\end{array}$
In Table 2.1,which is the correct fraction for determining the proportion of Independents in community B?

Accepted Answer

A) 15/17 
B) 15/264 
C) 64/15 
D) 15/64 
A) 15/17 
B) 15/264 
C) 64/15 
D) 15/64

Question 6

A class has 20 men and 10 women.The ratio of women to men is

Accepted Answer

A) 2 to 1. 
B) 1 to 2. 
C) 20%. 
D) .2. 
A) 2 to 1. 
B) 1 to 2. 
C) 20%. 
D) .2.

Question 7

Forty of every two hundred students attend all of their classes.What percentage of the student body is this?

Accepted Answer

A) 5% 
B) 50% 
C) 2% 
D) 20% 
A) 5% 
B) 50% 
C) 2% 
D) 20%

Question 8

The crude birth rate of a city that has 250 births in a year and a population of 7500 would be found by using which of the following?

Accepted Answer

A) crude birth rate = (250/7500)´ 1000 
B) crude birth rate = 7500/250 
C) crude birth rate = (1000/7500)´ 250 
D) crude birth rate = (250/1000)´ 7500 
A) crude birth rate = (250/7500)´ 1000 
B) crude birth rate = 7500/250 
C) crude birth rate = (1000/7500)´ 250 
D) crude birth rate = (250/1000)´ 7500

Question 9

The midpoints of intervals for frequency distributions constructed with interval-ratio variables are found by

Accepted Answer

A) adding the upper and lower class limits for each interval and then dividing by 2. 
B) multiplying the upper and lower class limits for each interval. 
C) dividing the range by 10. 
D) None of these.Class intervals for interval-ratio variables do not have midpoints. 
A) adding the upper and lower class limits for each interval and then dividing by 2. 
B) multiplying the upper and lower class limits for each interval. 
C) dividing the range by 10. 
D) None of these.Class intervals for interval-ratio variables do not have midpoints.

Question 10

A small town of 1,709 residents had one homicide in the past year.The homicide rate for this town

Accepted Answer

A) cannot be determined from the information given. 
B) is (1/1709)´ 100,000. 
C) is rising. 
D) is (1709:1)´ 1,000. 
A) cannot be determined from the information given. 
B) is (1/1709)´ 100,000. 
C) is rising. 
D) is (1709:1)´ 1,000.

Question 11

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

Accepted Answer

A) 11:21 
B) 11:64 
C) 64:11 
D) 9:11 
A) 11:21 
B) 11:64 
C) 64:11 
D) 9:11

Question 12

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

Accepted Answer

A) Community A 
B) Community B 
C) Neither 
D) This proportion can't be determined from the information given. 
A) Community A 
B) Community B 
C) Neither 
D) This proportion can't be determined from the information given.

Question 13

A city of 1567 people had 34 auto thefts last year.The auto theft rate for this city

Accepted Answer

A) cannot be determined from the information given. 
B) is falling. 
C) is (34/1567)´ 100,000. 
D) is (100,000 ´ 1567)/34. 
A) cannot be determined from the information given. 
B) is falling. 
C) is (34/1567)´ 100,000. 
D) is (100,000 ´ 1567)/34.

Question 14

The sum of the proportions for all categories of a variable will be

Accepted Answer

A) 100.00. 
B) 10.00. 
C) 1.00. 
D) 0.10. 
A) 100.00. 
B) 10.00. 
C) 1.00. 
D) 0.10.

Question 15

Cumulative frequencies and cumulative percentages allow a researcher to

Accepted Answer

A) be sure the column totals are correct. 
B) tell at a glance how many cases fall above or below a given category. 
C) show the accuracy of his or her findings. 
D) all of these 
A) be sure the column totals are correct. 
B) tell at a glance how many cases fall above or below a given category. 
C) show the accuracy of his or her findings. 
D) all of these

Question 16

Below are the scores of 25 students on a midterm test.Organize this information into a frequency distribution using a ten point grading scale for class intervals.Include columns for percentages and cumulative percentages.Write a brief description of the distribution.
 $\begin{array}{lllll}
35 & 45 & 65 & 75 & 87 \
80 & 69 & 71 & 53 & 90 \
99 & 95 & 70 & 82 & 73 \
93 & 67 & 61 & 57 & 74 \
72 & 77 & 71 & 81 & 83
\end{array}$

Accepted Answer

None

Question 17

Frequency distributions may be compiled for variables measured at which level?

Accepted Answer

A) nominal 
B) ordinal 
C) interval-ratio 
D) all of these 
A) nominal 
B) ordinal 
C) interval-ratio 
D) all of these

Question 18

The frequency distribution below displays the distribution of age for a sample drawn from a community.Finish the table by completing the columns for percentages,and cumulative percentages.
 $\begin{array}{|l|l|l|l|}
\hline\text {AGE  }\
\hline&\text {Cumulative}\
\hline \text { Class Intervals } & \text { Frequency } & \text { Percentages } & \text { Percentages } \
\hline 10-19 & 9 \
\hline 20-29 & 17 \
\hline 30-39 & 45 \
\hline 40-49 & 56 \
\hline 50-60 & 23 \
\hline 50-69 & 10 \
\hline 70-79 & 8 \
\hline \text { TOTAL } &  & \
\hline
\end{array}$

Accepted Answer

None

Question 19

Twenty-three of the 50 states rejected a proposed constitutional amendment to make the house fly the National Insect.What percentage is this?

Accepted Answer

A) 23% 
B) 25% 
C) 46% 
D) 54% 
A) 23% 
B) 25% 
C) 46% 
D) 54%

Question 20

A nation had a birth rate of 20 in 1990.The rate fell to 13 in 2000.What was the percentage change?

Accepted Answer

A)  $\left( \frac { 20 - 13 } { 20 } \right) \times 100 = 35 \%$ 
B)  $\left( \frac { 20 - 13 } { 13 } \right) \times 100 = 54 \%$ 
C)  $\left( \frac { 13 - 20 } { 20 } \right) \times 100 = - 35 \%$ 
D)  $\left( \frac { 13 - 20 } { 13 } \right) \times 100 = - 54 \%$ 
A)  $\left( \frac { 20 - 13 } { 20 } \right) \times 100 = 35 \%$ 
B)  $\left( \frac { 20 - 13 } { 13 } \right) \times 100 = 54 \%$ 
C)  $\left( \frac { 13 - 20 } { 20 } \right) \times 100 = - 35 \%$ 
D)  $\left( \frac { 13 - 20 } { 13 } \right) \times 100 = - 54 \%$

The ratio of men to women in a karate class is 3.3:1.If there are 100 women,how many men are there?

TABLE 2.2 AGES OF RESPONDENTS Class Intervals Frequency Percentages 18-23 5 24-29 21 30-40 10 TOTAL 36 A possible problem with Table 2.2 is that

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 proportion of cases are 18-23?

A frequency distribution should reflect a balance of

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,which is the correct fraction for determining the proportion of Independents in community B?

A class has 20 men and 10 women.The ratio of women to men is

Forty of every two hundred students attend all of their classes.What percentage of the student body is this?

The crude birth rate of a city that has 250 births in a year and a population of 7500 would be found by using which of the following?

The midpoints of intervals for frequency distributions constructed with interval-ratio variables are found by

A small town of 1,709 residents had one homicide in the past year.The homicide rate for this town

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 Socialists to Democrats 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,which community has the higher proportion of Independents?

A city of 1567 people had 34 auto thefts last year.The auto theft rate for this city

The sum of the proportions for all categories of a variable will be

Cumulative frequencies and cumulative percentages allow a researcher to

Frequency distributions may be compiled for variables measured at which level?

Twenty-three of the 50 states rejected a proposed constitutional amendment to make the house fly the National Insect.What percentage is this?

A nation had a birth rate of 20 in 1990.The rate fell to 13 in 2000.What was the percentage change?

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

The ratio of men to women in a karate class is 3.3:1.If there are 100 women,how many men are there?

TABLE 2.2 AGES OF RESPONDENTS Class Intervals Frequency Percentages 18-23 5 24-29 21 30-40 10 TOTAL 36 A possible problem with Table 2.2 is that

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 proportion of cases are 18-23?

A frequency distribution should reflect a balance of

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,which is the correct fraction for determining the proportion of Independents in community B?

A class has 20 men and 10 women.The ratio of women to men is

Forty of every two hundred students attend all of their classes.What percentage of the student body is this?

The crude birth rate of a city that has 250 births in a year and a population of 7500 would be found by using which of the following?

The midpoints of intervals for frequency distributions constructed with interval-ratio variables are found by

A small town of 1,709 residents had one homicide in the past year.The homicide rate for this town

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 Socialists to Democrats 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,which community has the higher proportion of Independents?

A city of 1567 people had 34 auto thefts last year.The auto theft rate for this city

The sum of the proportions for all categories of a variable will be

Cumulative frequencies and cumulative percentages allow a researcher to

Frequency distributions may be compiled for variables measured at which level?

Twenty-three of the 50 states rejected a proposed constitutional amendment to make the house fly the National Insect.What percentage is this?

A nation had a birth rate of 20 in 1990.The rate fell to 13 in 2000.What was the percentage change?

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