Question 1

It would be preferable to have a grouped frequency table rather than a frequency table when data:

Accepted Answer

A)  are small. 
B)  include many raw scores and only one group. 
C)  go to many decimal places and cover a large range. 
D)  contain many extreme observations. 
A)  are small. 
B)  include many raw scores and only one group. 
C)  go to many decimal places and cover a large range. 
D)  contain many extreme observations.

Question 2

A normal distribution is also known as a _____ distribution.

Accepted Answer

A)  nonsymmetrical 
B)  symmetrical 
C)  skewed 
D)  negative 
A)  nonsymmetrical 
B)  symmetrical 
C)  skewed 
D)  negative

Question 3

Use the following to answer questions 
This polygon represents a fictional distribution of scores.
Figure: Frequency Polygon  
-(Figure: Frequency Polygon) What seems to be the shape of the distribution represented in this frequency polygon?

Accepted Answer

A)  symmetrical 
B)  positively skewed 
C)  rectangle 
D)  negatively skewed 
A)  symmetrical 
B)  positively skewed 
C)  rectangle 
D)  negatively skewed

Question 4

A benefit to using the stem-and-leaf plot is that it easily identifies _____ and allows for quick comparisons between _____.

Accepted Answer

A)  outliers or unusual scores; variables 
B)  skew; different variables 
C)  symmetry; histograms 
D)  variables; floor and ceiling effects 
A)  outliers or unusual scores; variables 
B)  skew; different variables 
C)  symmetry; histograms 
D)  variables; floor and ceiling effects

Question 5

If 2 out of 3 dentists recommend a certain kind of gum, what percentage of dentists recommend that gum, rounded to the nearest whole number?

Accepted Answer

A)  23 
B)  33 
C)  67 
D)  80 
A)  23 
B)  33 
C)  67 
D)  80

Question 6

A _____ is a data point that has not yet been manipulated.

Accepted Answer

A)  frequency distribution 
B)  raw score 
C)  normal distribution 
D)  positively skewed distribution 
A)  frequency distribution 
B)  raw score 
C)  normal distribution 
D)  positively skewed distribution

Question 7

Raw scores are data that have not been modified from their original form.

Accepted Answer

A) True 
 B)False

Question 8

A histogram is typically used to depict scale data.

Accepted Answer

A) True 
 B)False

Question 9

When constructing a frequency table, the final step is to:

Accepted Answer

A)  count the number of scores at each value and write those numbers in the frequency column. 
B)  create two columns. 
C)  label one column Name and another column Frequency. 
D)  determine the highest and the lowest score. 
A)  count the number of scores at each value and write those numbers in the frequency column. 
B)  create two columns. 
C)  label one column Name and another column Frequency. 
D)  determine the highest and the lowest score.

Question 10

Use the following to answer questions 
This table and figure depict the average SAT scores for entering freshmen in the year 1995 at 36 North Carolina colleges.
$$\begin{array}{l}
\text { Table: North Carolina SAT }\
\begin{array} { r r r r } 
825 & 922 & 870 & 1121 \
990 & 1230 & 1302 & 926 \
1054 & 845 & 826 & 956 \
840 & 923 & 818 & 867 \
600 & 1030 & 831 & 935 \
890 & 879 & 1005 & 842 \
780 & 757 & 1002 & 774 \
915 & 921 & 1071 & 921 \
915 & 848 & 915 & 813
\end{array}
\end{array}$$
Figure: Histogram of SAT  
-(Figure: Histogram of SAT) Based on the frequency distribution, approximately how many participants scored 1000 or above?

Accepted Answer

A)  3 
B)  5 
C)  8 
D)  11 
A)  3 
B)  5 
C)  8 
D)  11

Question 11

Use the following to answer questions 
This table and figure depict the average SAT scores for entering freshmen in the year 1995 at 36 North Carolina colleges.
$$\begin{array}{l}
\text { Table: North Carolina SAT }\
\begin{array} { r r r r } 
825 & 922 & 870 & 1121 \
990 & 1230 & 1302 & 926 \
1054 & 845 & 826 & 956 \
840 & 923 & 818 & 867 \
600 & 1030 & 831 & 935 \
890 & 879 & 1005 & 842 \
780 & 757 & 1002 & 774 \
915 & 921 & 1071 & 921 \
915 & 848 & 915 & 813
\end{array}
\end{array}$$
Figure: Histogram of SAT  
-(Figure: Histogram of SAT) Based on the frequency distribution, what was the interval with the most common score?

Accepted Answer

A)  700-799 
B)  800-899 
C)  900-999 
D)  1000-1099 
A)  700-799 
B)  800-899 
C)  900-999 
D)  1000-1099

Question 12

A grouped frequency table is most useful when the:

Accepted Answer

A)  scores in the data set vary over a small range of discrete values. 
B)  data are ordinal. 
C)  data are measured on an interval scale and vary over a large range of continuous values. 
D)  data are nominal. 
A)  scores in the data set vary over a small range of discrete values. 
B)  data are ordinal. 
C)  data are measured on an interval scale and vary over a large range of continuous values. 
D)  data are nominal.

Question 13

Dr.Choi is examining the weights of 750 children, 2 to 18 years old, to find out if childhood obesity rates are increasing in his city.With this type of data, is it better to use a frequency table or a grouped frequency table? Why?

Accepted Answer

A)  A frequency table is better because the data are discrete whole numbers. 
B)  A frequency table is better because the data cover a small range. 
C)  A grouped frequency table is better because the data are a large set of continuous intervals. 
D)  A grouped frequency table is better because the data are nominal. 
A)  A frequency table is better because the data are discrete whole numbers. 
B)  A frequency table is better because the data cover a small range. 
C)  A grouped frequency table is better because the data are a large set of continuous intervals. 
D)  A grouped frequency table is better because the data are nominal.

Question 14

A _____ is a line graph with the x-axis and y-axis representing values (or midpoints of intervals) and frequencies, respectively.

Accepted Answer

A)  frequency polygon 
B)  frequency distribution 
C)  histogram 
D)  skewed distribution 
A)  frequency polygon 
B)  frequency distribution 
C)  histogram 
D)  skewed distribution

Question 15

A _____ is a data point that has not yet been transformed or analyzed.

Accepted Answer

A)  frequency table 
B)  raw score 
C)  frequency distribution 
D)  grouped frequency distribution 
A)  frequency table 
B)  raw score 
C)  frequency distribution 
D)  grouped frequency distribution

Question 16

In a _____, the tail of the distribution extends to the left.

Accepted Answer

A)  negatively skewed distribution 
B)  positively skewed distribution 
C)  normal distribution 
D)  floor effect 
A)  negatively skewed distribution 
B)  positively skewed distribution 
C)  normal distribution 
D)  floor effect

Question 17

A positive skew may have a tail that indicates extreme scores _____ the center of the distribution.

Accepted Answer

A)  around 
B)  below 
C)  above 
D)  on either side of 
A)  around 
B)  below 
C)  above 
D)  on either side of

Question 18

Bar graphs typically provide scores for _____ data.

Accepted Answer

A)  nominal 
B)  ordinal 
C)  interval 
D)  ratio 
A)  nominal 
B)  ordinal 
C)  interval 
D)  ratio

Question 19

Use the following to answer question 
This histogram represents the frequency of graduation rates for all U.S.colleges (data collected by U.S.News & World Report, 1995).
Figure: Graduation Rates  
-(Figure: Graduation Rates) The shape of the distribution of graduation rates appears to be:

Accepted Answer

A)  normal. 
B)  rectangular. 
C)  positively skewed. 
D)  negatively skewed. 
A)  normal. 
B)  rectangular. 
C)  positively skewed. 
D)  negatively skewed.

Question 20

To calculate a percentage in a frequency distribution:

Accepted Answer

A)  divide the number of participants in a group by the total number of participants and multiply by 100. 
B)  divide the total number of participants by the number of groups and multiply by 100. 
C)  multiply each raw score by a value of 100 and divide by 20. 
D)  divide the total number of participants by the number of participants in each group and divide by 100. 
A)  divide the number of participants in a group by the total number of participants and multiply by 100. 
B)  divide the total number of participants by the number of groups and multiply by 100. 
C)  multiply each raw score by a value of 100 and divide by 20. 
D)  divide the total number of participants by the number of participants in each group and divide by 100.

It would be preferable to have a grouped frequency table rather than a frequency table when data:

A normal distribution is also known as a _____ distribution.

Use the following to answer questions This polygon represents a fictional distribution of scores. Figure: Frequency Polygon -(Figure: Frequency Polygon) What seems to be the shape of the distribution represented in this frequency polygon?

A benefit to using the stem-and-leaf plot is that it easily identifies _ and allows for quick comparisons between _.

If 2 out of 3 dentists recommend a certain kind of gum, what percentage of dentists recommend that gum, rounded to the nearest whole number?

A _____ is a data point that has not yet been manipulated.

Raw scores are data that have not been modified from their original form.

A histogram is typically used to depict scale data.

When constructing a frequency table, the final step is to:

A grouped frequency table is most useful when the:

Dr.Choi is examining the weights of 750 children, 2 to 18 years old, to find out if childhood obesity rates are increasing in his city.With this type of data, is it better to use a frequency table or a grouped frequency table? Why?

A _____ is a line graph with the x-axis and y-axis representing values (or midpoints of intervals) and frequencies, respectively.

A _____ is a data point that has not yet been transformed or analyzed.

In a _____, the tail of the distribution extends to the left.

A positive skew may have a tail that indicates extreme scores _____ the center of the distribution.

Bar graphs typically provide scores for _____ data.

Use the following to answer question This histogram represents the frequency of graduation rates for all U.S.colleges (data collected by U.S.News & World Report, 1995). Figure: Graduation Rates -(Figure: Graduation Rates) The shape of the distribution of graduation rates appears to be:

To calculate a percentage in a frequency distribution:

An Introduction to Statistics and Research Design

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 2: Frequency Distributions

It would be preferable to have a grouped frequency table rather than a frequency table when data:

A normal distribution is also known as a _____ distribution.

Use the following to answer questions This polygon represents a fictional distribution of scores. Figure: Frequency Polygon -(Figure: Frequency Polygon) What seems to be the shape of the distribution represented in this frequency polygon?

A benefit to using the stem-and-leaf plot is that it easily identifies _____ and allows for quick comparisons between _____.

If 2 out of 3 dentists recommend a certain kind of gum, what percentage of dentists recommend that gum, rounded to the nearest whole number?

A _____ is a data point that has not yet been manipulated.

Raw scores are data that have not been modified from their original form.

A histogram is typically used to depict scale data.

When constructing a frequency table, the final step is to:

A grouped frequency table is most useful when the:

Dr.Choi is examining the weights of 750 children, 2 to 18 years old, to find out if childhood obesity rates are increasing in his city.With this type of data, is it better to use a frequency table or a grouped frequency table? Why?

A _____ is a line graph with the x-axis and y-axis representing values (or midpoints of intervals) and frequencies, respectively.

A _____ is a data point that has not yet been transformed or analyzed.

In a _____, the tail of the distribution extends to the left.

A positive skew may have a tail that indicates extreme scores _____ the center of the distribution.

Bar graphs typically provide scores for _____ data.

Use the following to answer question This histogram represents the frequency of graduation rates for all U.S.colleges (data collected by U.S.News & World Report, 1995). Figure: Graduation Rates -(Figure: Graduation Rates) The shape of the distribution of graduation rates appears to be:

To calculate a percentage in a frequency distribution:

An Introduction to Statistics and Research Design

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

A benefit to using the stem-and-leaf plot is that it easily identifies _ and allows for quick comparisons between _.