Question 1

A grouped frequency distribution table lists one interval as,20-29.The width of this interval is 9 points.

Accepted Answer

A) True 
 B)False

Question 2

What is the total number of scores for the distribution shown in the following table?? $$\begin{array} { l l } 
\mathrm { X } & \mathrm { f } \
4 & 3 \
3 & 5 \
2 & 4 \
1 & 2 \
\hline
\end{array}$$

Accepted Answer

A) ?4 
B) ?10 
C) ?14 
D) ?37 
A) ?4 
B) ?10 
C) ?14 
D) ?37

Question 3

For the distribution in the following table,the percentile rank for X = 25 is 82%.? $$\begin{array} { l r } 
\mathrm { X } & \mathrm { c } \% \
\hline 25 - 29 & 100 \% \
20 - 24 & 80 \% \
15 - 19 & 20 \% \
\hline
\end{array}$$

Accepted Answer

A) True 
 B)False

Question 4

Figure 2-2
-What is the shape for the distribution shown in the accompanying graph in Figure 2.2?​

Accepted Answer

A) ​positively skewed 
B) ​negatively skewed 
C) ​symmetrical 
D) ​normal 
A) ​positively skewed 
B) ​negatively skewed 
C) ​symmetrical 
D) ​normal

Question 5

What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?​

Accepted Answer

A) ​a bar graph 
B) ​a histogram 
C) ​a polygon 
D) ​a pie chart 
A) ​a bar graph 
B) ​a histogram 
C) ​a polygon 
D) ​a pie chart

Question 6

For the following distribution of scores,SX2 = 92.? $$\begin{array} { l l } 
X & f \
4 & 1 \
3 & 2 \
2 & 3 \
1 & 2 \
\hline
\end{array}$$

Accepted Answer

A) True 
 B)False

Question 7

What term is used to describe the shape of a distribution in which the scores pile up on the left-hand side of the graph and taper off to the right?​

Accepted Answer

A) ​symmetrical 
B) ​positively skewed 
C) ​negatively skewed 
D) ​normal 
A) ​symmetrical 
B) ​positively skewed 
C) ​negatively skewed 
D) ​normal

Question 8

Figure 2-2
-A skewed distribution typically has ____ tail(s)and a normal distribution has ____ tail(s).​

Accepted Answer

A) ​1; 1 
B) ​1; 2 
C) ​2,;1 
D) ​2; 2 
A) ​1; 1 
B) ​1; 2 
C) ​2,;1 
D) ​2; 2

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

A) ?n = 5 
B) ?n = 7 
C) ?n = 15 
D) ?n = 21 
A) ?n = 5 
B) ?n = 7 
C) ?n = 15 
D) ?n = 21

Question 11

For the following distribution of quiz scores,if a score of X = 3 or higher is needed for a passing grade,how many individuals passed?? $$\begin{array} { l l } 
\mathrm { x } & \mathrm { f } \
5 & 6 \
4 & 5 \
3 & 5 \
2 & 3 \
1 & 2 \
\hline
\end{array}$$

Accepted Answer

A) ?3 
B) ?11 
C) ?16 
D) ?21 
A) ?3 
B) ?11 
C) ?16 
D) ?21

Question 12

Construct a stem and leaf display for the following scores.​30,23,58,28,35,67,27,42,46,3551,33,18,33,25,38,48,36,31,39

Accepted Answer

None

Question 13

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 14

For the following distribution of scores,SX = 18.? $$\begin{array} { l l } 
X & f \
4 & 1 \
3 & 2 \
2 & 3 \
1 & 2 \
\hline
\end{array}$$

Accepted Answer

A) True 
 B)False

Question 15

In the following distribution,the scores are grouped into class intervals that are each 5 points wide.? $$\begin{array} { l c } 
\mathrm { X } & \mathrm { f } \
20 - 24 & 2 \
15 - 19 & 5 \
10 - 14 & 4 \
5 - 9 & 1 \
\hline
\end{array}$$

Accepted Answer

A) True 
 B)False

Question 16

The scores for a very easy exam would probably form a positively skewed distribution.​

Accepted Answer

A) True 
 B)False

Question 17

Find each value requested for the set of scores in the following frequency distribution table.
a. n $$\begin{array} { c l } 
\text { Score } & \mathrm { f } \
5 & 1 \
4 & 2 \
3 & 3 \
2 & 5 \
1 & 2
\end{array}$$ 
b. ΣX
c. ΣX2

Accepted Answer

a.n = 13
b

Question 18

For the distribution in the following table,what is the 50th percentile?? $$\begin{array} { l c } 
\mathrm { X } & \mathrm { c } \% \
9 & 100 \% \
8 & 80 \% \
7 & 50 \% \
6 & 25 \% \
\hline
\end{array}$$

Accepted Answer

A) ?X = 8 
B) ?X = 7.5 
C) ?X = 7 
D) ?X = 6.5 
A) ?X = 8 
B) ?X = 7.5 
C) ?X = 7 
D) ?X = 6.5

Question 19

A score equal to the 5th percentile is one of the highest scores in the distribution.​

Accepted Answer

A) True 
 B)False

Question 20

Figure 2.1
-For the distribution in the accompanying graph,Figure 2.1,what is the value of ΣX?​

Accepted Answer

A) ​10 
B) ​15 
C) ​21 
D) ​30 
A) ​10 
B) ​15 
C) ​21 
D) ​30

A grouped frequency distribution table lists one interval as,20-29.The width of this interval is 9 points.

What is the total number of scores for the distribution shown in the following table?? 4 3 3 5 2 4 1 2

For the distribution in the following table,the percentile rank for X = 25 is 82%.? \% 25-29 100\% 20-24 80\% 15-19 20\%

Figure 2-2 -What is the shape for the distribution shown in the accompanying graph in Figure 2.2?

What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?

For the following distribution of scores,SX² = 92.? X f 4 1 3 2 2 3 1 2

What term is used to describe the shape of a distribution in which the scores pile up on the left-hand side of the graph and taper off to the right?

Figure 2-2 -A skewed distribution typically has tail(s)and a normal distribution has tail(s).

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

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

For the following distribution of quiz scores,if a score of X = 3 or higher is needed for a passing grade,how many individuals passed?? 5 6 4 5 3 5 2 3 1 2

Construct a stem and leaf display for the following scores.30,23,58,28,35,67,27,42,46,3551,33,18,33,25,38,48,36,31,39

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

For the following distribution of scores,SX = 18.? X f 4 1 3 2 2 3 1 2

In the following distribution,the scores are grouped into class intervals that are each 5 points wide.? 20-24 2 15-19 5 10-14 4 5-9 1

The scores for a very easy exam would probably form a positively skewed distribution.

Find each value requested for the set of scores in the following frequency distribution table. a. n Score 5 1 4 2 3 3 2 5 1 2 b. ΣX c. ΣX²

For the distribution in the following table,what is the 50^th percentile?? \% 9 100\% 8 80\% 7 50\% 6 25\%

A score equal to the 5th percentile is one of the highest scores in the distribution.

Figure 2.1 -For the distribution in the accompanying graph,Figure 2.1,what is the value of ΣX?

Introduction to Statistics

Central Tendency

Variability

Z-Scores: Location of Scores and Standardized Distributions

Probability

Probability and Samples: 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 Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

The Binomial Test

Filters

Exam 2: Frequency Distributions

A grouped frequency distribution table lists one interval as,20-29.The width of this interval is 9 points.

What is the total number of scores for the distribution shown in the following table?? 4 3 3 5 2 4 1 2

For the distribution in the following table,the percentile rank for X = 25 is 82%.? \% 25-29 100\% 20-24 80\% 15-19 20\%

Figure 2-2 -What is the shape for the distribution shown in the accompanying graph in Figure 2.2?​

What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?​

For the following distribution of scores,SX2 = 92.? X f 4 1 3 2 2 3 1 2

What term is used to describe the shape of a distribution in which the scores pile up on the left-hand side of the graph and taper off to the right?​

Figure 2-2 -A skewed distribution typically has ____ tail(s)and a normal distribution has ____ tail(s).​

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

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

For the following distribution of quiz scores,if a score of X = 3 or higher is needed for a passing grade,how many individuals passed?? 5 6 4 5 3 5 2 3 1 2

Construct a stem and leaf display for the following scores.​30,23,58,28,35,67,27,42,46,3551,33,18,33,25,38,48,36,31,39

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

For the following distribution of scores,SX = 18.? X f 4 1 3 2 2 3 1 2

In the following distribution,the scores are grouped into class intervals that are each 5 points wide.? 20-24 2 15-19 5 10-14 4 5-9 1

The scores for a very easy exam would probably form a positively skewed distribution.​

Find each value requested for the set of scores in the following frequency distribution table. a. n Score 5 1 4 2 3 3 2 5 1 2 b. ΣX c. ΣX2

For the distribution in the following table,what is the 50th percentile?? \% 9 100\% 8 80\% 7 50\% 6 25\%

A score equal to the 5th percentile is one of the highest scores in the distribution.​

Figure 2.1 -For the distribution in the accompanying graph,Figure 2.1,what is the value of ΣX?​

Introduction to Statistics

Central Tendency

Variability

Z-Scores: Location of Scores and Standardized Distributions

Probability

Probability and Samples: 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 Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

The Binomial Test

Filters

Figure 2-2 -What is the shape for the distribution shown in the accompanying graph in Figure 2.2?

What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?

For the following distribution of scores,SX² = 92.? X f 4 1 3 2 2 3 1 2

What term is used to describe the shape of a distribution in which the scores pile up on the left-hand side of the graph and taper off to the right?

Figure 2-2 -A skewed distribution typically has tail(s)and a normal distribution has tail(s).

Construct a stem and leaf display for the following scores.30,23,58,28,35,67,27,42,46,3551,33,18,33,25,38,48,36,31,39

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

The scores for a very easy exam would probably form a positively skewed distribution.

Find each value requested for the set of scores in the following frequency distribution table. a. n Score 5 1 4 2 3 3 2 5 1 2 b. ΣX c. ΣX²

For the distribution in the following table,what is the 50^th percentile?? \% 9 100\% 8 80\% 7 50\% 6 25\%

A score equal to the 5th percentile is one of the highest scores in the distribution.

Figure 2.1 -For the distribution in the accompanying graph,Figure 2.1,what is the value of ΣX?