Question 1

For the following distribution, what is the width of each class interval? $\begin{array}{cc}
X & f \
\hline 20-24 & 2 \
15-19 & 5 \
10-14 & 4 \
5-9 & 1
\end{array}$

Accepted Answer

A)  4 
B)  $ 4.5 $ 
C)  5 
D)  10 
A)  4 
B)  $ 4.5 $ 
C)  5 
D)  10

Question 2

In the following distribution, the scores are grouped into class intervals that are each 5 points wide.

Accepted Answer

A) True 
 B)False

Question 3

What kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars?

Accepted Answer

A) a bar graph 
B) a histogram 
C) a polygon 
D) all of the above 
A) a bar graph 
B) a histogram 
C) a polygon 
D) all of the above

Question 4

A group of quiz scores ranges from 3 to 10, but no student had a score of X = 5.If the scores are put in a frequency distribution table, X = 5 would not be listed in the X column.

Accepted Answer

A) True 
 B)False

Question 5

In a grouped frequency distribution table, the top value in each class interval should be a multiple of the interval width.

Accepted Answer

A) True 
 B)False

Question 6

If a set of exam scores forms a negatively skewed distribution, it suggests that the majority of the students did not score well on the exam.

Accepted Answer

A) True 
 B)False

Question 7

For the distribution in the following table, what is the percentile rank for X = 8.5? $\begin{array}{cc}
X & C / 0 \
\hline 9 & 100 \% \
8 & 80 \% \
7 & 50 \% \
6 & 25 \%
\end{array}$

Accepted Answer

A)  $ \mathrm{X}=90 \% $ 
B)  $ X=80 \% $ 
C)  $ X=65 \% $ 
D)  $ X=50 \% $ 
A)  $ \mathrm{X}=90 \% $ 
B)  $ X=80 \% $ 
C)  $ X=65 \% $ 
D)  $ X=50 \% $

Question 8

In February in New York, the daily high temperatures are typically low with only a few relatively warm days.A frequency distribution showing the daily high temperatures would probably form a negatively skewed distribution.

Accepted Answer

A) True 
 B)False

Question 9

For the distribution in the following table, what is the percentile rank for X = 7? 
$\begin{array}{cc}
X & C / 0 \
\hline 9 & 100 \% \
8 & 80 \% \
7 & 50 \% \
6 & 25 \%
\end{array}$

Accepted Answer

A)  $ X=80 \% $ 
B)  $ X=65 \% $ 
C)  $ X=50 \% $ 
D)  $ X=37.5 \% $ 
A)  $ X=80 \% $ 
B)  $ X=65 \% $ 
C)  $ X=50 \% $ 
D)  $ X=37.5 \% $

Question 10

A researcher records the number of traffic tickets issued in each county along the New York State thruway.If the results are presented in a frequency distribution graph, what kind of graph should be used?

Accepted Answer

A) a bar graph 
B) a histogram 
C) a polygon 
D) either a histogram or a polygon 
A) a bar graph 
B) a histogram 
C) a polygon 
D) either a histogram or a polygon

Question 11

For the following distribution of scores, $\sum$X2 = 92. $\begin{array}{ll}
X & f \
\hline 4 & 1 \
3 & 2 \
2 & 3 \
1 & 2
\end{array}$

Accepted Answer

A) True 
 B)False

Question 12

What frequency distribution graph is appropriate for scores measured on a nominal scale?

Accepted Answer

A) only a histogram 
B) only a polygon 
C) either a histogram or a polygon 
D) only a bar graph 
A) only a histogram 
B) only a polygon 
C) either a histogram or a polygon 
D) only a bar graph

Question 13

A histogram is constructed so that adjacent bars touch.

Accepted Answer

A) True 
 B)False

Question 14

For the scores shown in the following stem and leaf display, what is the highest score in the distribution? $\begin{array}{l|l}
8 & 314 \
7 & 945 \
6 & 7042 \
5 & 68 \
4 & 14
\end{array}$

Accepted Answer

A)  8 
B)  83 
C)  84 
D)  7042 
A)  8 
B)  83 
C)  84 
D)  7042

Question 15

The normal distribution is an example of

Accepted Answer

A) a histogram showing data from a sample 
B) a polygon showing data from a sample 
C) a bar graph showing data from a population 
D) a smooth curve showing data from a population 
A) a histogram showing data from a sample 
B) a polygon showing data from a sample 
C) a bar graph showing data from a population 
D) a smooth curve showing data from a population

Question 16

If a set of exam scores forms a symmetrical distribution, what can you conclude about the students scores?

Accepted Answer

A) Most of the students had relatively high scores. 
B) Most of the students had relatively low scores. 
C) About 50% of the students had high scores and the rest had low scores. 
D) It is not possible the draw any conclusions about the students' scores. 
A) Most of the students had relatively high scores. 
B) Most of the students had relatively low scores. 
C) About 50% of the students had high scores and the rest had low scores. 
D) It is not possible the draw any conclusions about the students' scores.

Question 17

A researcher surveys a sample of n = 200 college students and asks each person to identify his or her favorite movie from the past year.If the results are presented in a frequency distribution graph, the researcher should use a bar graph.

Accepted Answer

A) True 
 B)False

Question 18

For the following frequency distribution of quiz scores, how many individuals took the quiz? 
$\begin{array}{cc}
X & f \
\hline 5 & 6 \
4 & 5 \
3 & 5 \
2 & 3 \
1 & 2
\end{array}$

Accepted Answer

A)  $ n=5 $ 
B)  $ n=15 $ 
C)  $ n=21 $ 
D)  cannot be determined 
A)  $ n=5 $ 
B)  $ n=15 $ 
C)  $ n=21 $ 
D)  cannot be determined

Question 19

For the distribution in the following table, what is the 50th percentile? $\begin{array}{cc}
Y & 0 / 0 \
\hline 9 & 100 \% \
8 & 80 \% \
7 & 50 \% \
6 & 250 / 0
\end{array}$

Accepted Answer

A)  $ X=8 $ 
B)  $ \mathrm{X}=7.5 $ 
C)  $ X=7 $ 
D)  $ X=6.5 $ 
A)  $ X=8 $ 
B)  $ \mathrm{X}=7.5 $ 
C)  $ X=7 $ 
D)  $ X=6.5 $

Question 20

If it is appropriate to present a distribution of scores in a polygon, then it would also be appropriate to present the scores in a bar graph.

Accepted Answer

A) True 
 B)False

For the following distribution, what is the width of each class interval? X f 20-24 2 15-19 5 10-14 4 5-9 1

In the following distribution, the scores are grouped into class intervals that are each 5 points wide.

What kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars?

A group of quiz scores ranges from 3 to 10, but no student had a score of X = 5.If the scores are put in a frequency distribution table, X = 5 would not be listed in the X column.

In a grouped frequency distribution table, the top value in each class interval should be a multiple of the interval width.

If a set of exam scores forms a negatively skewed distribution, it suggests that the majority of the students did not score well on the exam.

For the distribution in the following table, what is the percentile rank for X = 8.5? X C/0 9 100\% 8 80\% 7 50\% 6 25\%

In February in New York, the daily high temperatures are typically low with only a few relatively warm days.A frequency distribution showing the daily high temperatures would probably form a negatively skewed distribution.

For the distribution in the following table, what is the percentile rank for X = 7? X C/0 9 100\% 8 80\% 7 50\% 6 25\%

A researcher records the number of traffic tickets issued in each county along the New York State thruway.If the results are presented in a frequency distribution graph, what kind of graph should be used?

For the following distribution of scores, $\sum$ X² = 92. X f 4 1 3 2 2 3 1 2

What frequency distribution graph is appropriate for scores measured on a nominal scale?

A histogram is constructed so that adjacent bars touch.

For the scores shown in the following stem and leaf display, what is the highest score in the distribution? 8 314 7 945 6 7042 5 68 4 14

The normal distribution is an example of

If a set of exam scores forms a symmetrical distribution, what can you conclude about the students scores?

A researcher surveys a sample of n = 200 college students and asks each person to identify his or her favorite movie from the past year.If the results are presented in a frequency distribution graph, the researcher should use a bar graph.

For the following frequency distribution of quiz scores, how many individuals took the quiz? X f 5 6 4 5 3 5 2 3 1 2

For the distribution in the following table, what is the 50^th percentile? Y 0/0 9 100\% 8 80\% 7 50\% 6 250/0

If it is appropriate to present a distribution of scores in a polygon, then it would also be appropriate to present the scores in a bar graph.

Introduction to Statistics

Central Tendency

Variability

Z-Scores

Probability

The Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

Exam 2: Frequency Distributions

For the following distribution, what is the width of each class interval? X f 20-24 2 15-19 5 10-14 4 5-9 1

In the following distribution, the scores are grouped into class intervals that are each 5 points wide.

What kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars?

A group of quiz scores ranges from 3 to 10, but no student had a score of X = 5.If the scores are put in a frequency distribution table, X = 5 would not be listed in the X column.

In a grouped frequency distribution table, the top value in each class interval should be a multiple of the interval width.

If a set of exam scores forms a negatively skewed distribution, it suggests that the majority of the students did not score well on the exam.

For the distribution in the following table, what is the percentile rank for X = 8.5? X C/0 9 100\% 8 80\% 7 50\% 6 25\%

In February in New York, the daily high temperatures are typically low with only a few relatively warm days.A frequency distribution showing the daily high temperatures would probably form a negatively skewed distribution.

For the distribution in the following table, what is the percentile rank for X = 7? X C/0 9 100\% 8 80\% 7 50\% 6 25\%

A researcher records the number of traffic tickets issued in each county along the New York State thruway.If the results are presented in a frequency distribution graph, what kind of graph should be used?

For the following distribution of scores, ∑\sum∑ X2 = 92. X f 4 1 3 2 2 3 1 2

What frequency distribution graph is appropriate for scores measured on a nominal scale?

A histogram is constructed so that adjacent bars touch.

For the scores shown in the following stem and leaf display, what is the highest score in the distribution? 8 314 7 945 6 7042 5 68 4 14

The normal distribution is an example of

If a set of exam scores forms a symmetrical distribution, what can you conclude about the students scores?

A researcher surveys a sample of n = 200 college students and asks each person to identify his or her favorite movie from the past year.If the results are presented in a frequency distribution graph, the researcher should use a bar graph.

For the following frequency distribution of quiz scores, how many individuals took the quiz? X f 5 6 4 5 3 5 2 3 1 2

For the distribution in the following table, what is the 50th percentile? Y 0/0 9 100\% 8 80\% 7 50\% 6 250/0

If it is appropriate to present a distribution of scores in a polygon, then it would also be appropriate to present the scores in a bar graph.

Introduction to Statistics

Central Tendency

Variability

Z-Scores

Probability

The Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

For the following distribution of scores, $\sum$ X² = 92. X f 4 1 3 2 2 3 1 2

For the distribution in the following table, what is the 50^th percentile? Y 0/0 9 100\% 8 80\% 7 50\% 6 250/0