Question 1

If a set of scores is displayed in a frequency distribution polygon,what scale of measurement was used to measure the scores?
A)Nominal or ordinal
B)Interval
C)Ratio
D)Interval or ratio

Accepted Answer

A frequency distribution polygon requires continuous data, which is measured on an interval or ratio scale. Nominal and ordinal scales are not suitable for this.

Question 2

What frequency distribution graph is appropriate for scores measured on a nominal scale?
A)Only a histogram
B)Only a polygon
C)Either a histogram or a polygon
D)Only a bar graph

Accepted Answer

The appropriate graph for nominal scale data is a bar graph because this type of data has distinct categories or groups that cannot be arranged in any meaningful order, and a bar graph is used to compare the frequency or proportion of scores within each category. Histograms are used for continuous or interval data, and polygons are used to show the distribution of scores over intervals on a continuous scale.

Question 3

A researcher collects a sample of n = 20 Introductory Psychology textbooks and records the number of pages in each book.The results are then placed in a grouped frequency distribution table using intervals of 0-99 pages,100-199 pages,200,299 pages,and so on.If the results were converted into a frequency distribution graph,what kind of graph should be used?
A)A bar graph
B)A histogram
C)A polygon
D)Either a histogram or a polygon

Accepted Answer

A histogram or a polygon is appropriate for displaying the frequency distribution of continuous data, such as the number of pages in textbooks. Both types of graphs are used to represent the distribution of numerical data and are suitable for grouped data like the intervals mentioned.

Question 4

A biologist records the number of trout,bass,perch,and other types of fish caught in a local lake during a 2-week period.If the results are organized in a frequency distribution graph,what kind of graph should be used?
A)A bar graph
B)A histogram
C)A polygon
D)Either a histogram or a polygon

Accepted Answer

A bar graph is the best choice for organizing the frequency distribution of the different types of fish caught in the lake during a 2-week period. This is because a bar graph is a good way to compare categories, in this case different types of fish, by showing the frequency or count of each type of fish using bars of different heights. A histogram and a polygon are better used for displaying continuous data, such as age ranges or test scores, and not for discrete categories like types of fish caught.

Question 5

If a set of scores is displayed in a frequency distribution bar graph,what scale of measurement was used to measure the scores?
A)Nominal
B)Ordinal
C)Nominal or ordinal
D)Interval or ratio

Accepted Answer

Frequency distribution bar graphs can be used for data measured on nominal or ordinal scales, as these graphs display the frequencies of categories or ranks without assuming equal intervals between data points.

Question 6

A biologist records the number of trout,bass,perch,and other types of fish caught in a local lake during a 2-week period.If the results are organized in a frequency distribution table,what values would be listed in the first column?
A)Frequencies
B)Different types of fish
C)The 14 days
D)The days of the week

Accepted Answer

The first column would list the different types of fish caught, as this is the variable being measured and categorized in the frequency distribution table.

Question 7

What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?
A)A bar graph
B)A histogram
C)A polygon
D)All of these

Accepted Answer

A bar graph is the only frequency distribution graph that shows the frequencies as bars that are separated by spaces. A histogram uses adjacent bars to represent the intervals and a polygon uses connected points to represent the frequencies.

Question 8

Which types of graphs are used for data from an interval scale?
A)Histograms and bar graphs
B)Polygons and bar graphs
C)Histograms and polygons
D)Histograms,bar graphs,and polygons

Accepted Answer

Histograms and polygons are the best choices for data from an interval scale, as they both display the distribution of continuous data. Histograms show the frequency distribution of intervals, while polygons connect the midpoints of each interval to show the overall shape of the data. Bar graphs are typically used for categorical data, and may not accurately represent the shape of data on an interval scale.

Question 9

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 data were organized in a frequency distribution table,what would be listed in the first column?
A)A list of movies
B)A list of students
C)A list of frequencies
D)None of the other options is correct

Accepted Answer

The first column in a frequency distribution table typically lists the categories or classes being observed, which in this case would be the different movies that the college students identified as their favorite from the past year. The other options (B and C) are not correct because a list of students or frequencies would not be the appropriate way to organize the data in this context.

Question 10

A set of scores ranges from a high of X = 24 to a low of X = 5.If these scores were put in a frequency distribution table with an interval width of 2 points,which of the following would be the top interval in the table?
A)4-5
B)23-24
C)24-25
D)22-24

Accepted Answer

The answer of A set of scores ranges from a...

Question 11

In a grouped frequency distribution,one interval is listed as 50-59.Assuming that the scores are measuring a continuous variable,what are the real limits for this interval?
A)50 and 59
B)50.5 and 59.5
C)49.5 and 59.5
D)49.5 and 60.5

Accepted Answer

The real limits for the interval 50-59, assuming a continuous variable, are 49.5 and 59.5. This accounts for the idea that any value between 49.5 and up to (but not including) 50.5 is rounded to 50, and similarly for the upper limit.

Question 12

A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3.If these scores are placed in a frequency distribution table,how many X values will be listed in the first column?
A)8
B)9
C)10
D)It depends on whether any scores have a zero frequency.

Accepted Answer

The first column in a frequency distribution table lists the range of scores or "bins" that are being counted. In this case, the range is from 3 to 11, which includes 9 possible X values (3, 4, 5, 6, 7, 8, 9, 10, and 11). Therefore, the answer is B.

Question 13

A frequency distribution graph represents frequencies with vertical bars without space between them.What scale of measurement was used to measure the scores?
A)Nominal
B)Ordinal
C)Nominal or ordinal
D)Interval or ratio

Accepted Answer

A frequency distribution graph with vertical bars without space between them is most commonly used to represent interval or ratio data. This is because the bars represent continuous numerical values without any gaps in between, which is a characteristic of interval and ratio data. Nominal and ordinal data would typically be represented using a different type of graph, such as a pie chart or a bar chart with space between the bars. However, it is possible that the scores were measured using a nominal or ordinal scale but later converted into an interval or ratio scale for the purpose of creating the frequency distribution graph. Therefore, the answer is D.

Question 14

In a frequency distribution graph,frequencies are presented on the ,and the scores (categories)are listed on the .
A)X axis; Y axis
B)horizontal line; vertical line
C)Y axis; X axis
D)class interval; horizontal line

Accepted Answer

In a frequency distribution graph, the frequencies (how often each score or category occurs) are typically represented on the Y axis (vertical), and the scores or categories themselves are listed on the X axis (horizontal).

Question 15

If a distribution of scores is shown in a bar graph,you know that the scores were measured on a(n)_________ scale of measurement.
A)nominal or ordinal
B)ordinal or interval
C)interval or ratio
D)discrete or continuous

Accepted Answer

Bar graphs are used for categorical data, which corresponds to nominal or ordinal scales of measurement, where categories or ordered ranks are represented.

Question 16

A set of scores ranges from a high of X = 72 to a low of X = 28.If these scores were put in a grouped frequency distribution table,what would be the best choice for the interval width?
A)2 points
B)5 points
C)7 points
D)10 points

Accepted Answer

The interval width should be large enough to minimize the number of intervals, but small enough to provide enough detail about the distribution of scores. A rule of thumb suggests that the interval width should be between 5 and 20 points. In this case, a 5 point interval width would yield 9 intervals, which is enough to provide some detail about the distribution without too much overlap.

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 were presented in a frequency distribution graph,what kind of graph would be appropriate?
A)A histogram
B)A polygon
C)A histogram or a polygon
D)A bar graph

Accepted Answer

Since the data is categorical (favorite movies), a bar graph is appropriate for displaying the frequency of each category. Histograms and polygons are used for continuous data.

Question 18

What kind of frequency distribution graph shows the frequencies as bars,with no space between adjacent bars?
A)A bar graph
B)A histogram
C)A polygon
D)All of these

Accepted Answer

A histogram shows the frequencies as bars with no space between adjacent bars. A bar graph can have space between adjacent bars, and a polygon is a line graph connecting the frequencies at their respective values.

Question 19

After recording the final grade (A,B,C,D,E)for each individual in a class of n = 26 students,the professor would like to display the grade distribution in a frequency distribution graph.What kind of graph should be used?
A)A bar graph
B)A histogram
C)A polygon
D)Either a histogram or a polygon

Accepted Answer

A bar graph is the best choice for displaying the grade distribution because it provides a visual representation of the frequency of each grade category (A,B,C,D,E) and allows for easy comparison between them. The bars can be arranged in order of grade category, and the height of each bar can represent the frequency of students receiving that grade.

Question 20

A set of scores ranges from a high of X = 96 to a low of X = 11.If these scores were placed in a grouped frequency distribution table,what is the best value for the interval width?
A)5 points
B)8 points
C)9 points
D)10 points

Accepted Answer

The range of scores is 96-11 = 85. To get a reasonable number of intervals, we should aim for around 10 intervals. 85/10 = 8.5. Since the interval width should be a whole number, the best choice is 10 points.

Quiz 2: Frequency Distributions

If a set of scores is displayed in a frequency distribution polygon,what scale of measurement was used to measure the scores?

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

A biologist records the number of trout,bass,perch,and other types of fish caught in a local lake during a 2-week period.If the results are organized in a frequency distribution graph,what kind of graph should be used?

If a set of scores is displayed in a frequency distribution bar graph,what scale of measurement was used to measure the scores?

A biologist records the number of trout,bass,perch,and other types of fish caught in a local lake during a 2-week period.If the results are organized in a frequency distribution table,what values would be listed in the first column?

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

Which types of graphs are used for data from an interval scale?

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 data were organized in a frequency distribution table,what would be listed in the first column?

A set of scores ranges from a high of X = 24 to a low of X = 5.If these scores were put in a frequency distribution table with an interval width of 2 points,which of the following would be the top interval in the table?

In a grouped frequency distribution,one interval is listed as 50-59.Assuming that the scores are measuring a continuous variable,what are the real limits for this interval?

A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3.If these scores are placed in a frequency distribution table,how many X values will be listed in the first column?

A frequency distribution graph represents frequencies with vertical bars without space between them.What scale of measurement was used to measure the scores?

In a frequency distribution graph,frequencies are presented on the ,and the scores (categories) are listed on the .

If a distribution of scores is shown in a bar graph,you know that the scores were measured on a(n) _________ scale of measurement.

A set of scores ranges from a high of X = 72 to a low of X = 28.If these scores were put in a grouped frequency distribution table,what would be the best choice for the interval width?

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 were presented in a frequency distribution graph,what kind of graph would be appropriate?

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

After recording the final grade (A,B,C,D,E) for each individual in a class of n = 26 students,the professor would like to display the grade distribution in a frequency distribution graph.What kind of graph should be used?

A set of scores ranges from a high of X = 96 to a low of X = 11.If these scores were placed in a grouped frequency distribution table,what is the best value for the interval width?