Deck 2: Frequency Distributions

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

Answer 1

D

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

Answer 2

D

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

Answer 3

D

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

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

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

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

Question 21

A set of scores ranges from X = 18 to X= 91.If the scores were put in a grouped frequency distribution table with an interval width of 10 points,the top interval would be 91-100.

Question 22

The normal distribution is an example of

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 23

In a grouped frequency distribution table,one interval is identified as 30-34.This interval has a width of 5 points.

Question 24

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.

Question 25

A set of scores ranges from a low of X = 18 to a high of X = 98.If the scores are put in a grouped frequency distribution table with an interval width of 10 points,the bottom interval should be 10-19.

Question 26

If a distribution with more than 15 or 20 scores is being organized in a frequency distribution table,then a grouped table should be used.

Question 27

If a set of exam scores forms a symmetrical distribution,what can you conclude 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 to draw any conclusions about students' scores.

Question 28

In a distribution with positive skew,scores with the highest frequencies are _____.

A)on the right side of the distribution
B)on the left side of the distribution
C)in the middle of the distribution
D)represented at two distinct peaks

Question 29

A skewed distribution typically has _____ tail(s)and a normal distribution has ____ tail(s).

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

Question 30

If a frequency distribution is presented in a polygon,then the scores were measured on an interval or a ratio scale.

Question 31

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?

A)Symmetrical
B)Positively skewed
C)Negatively skewed
D)Normal

Question 32

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

Question 33

If a set of exam scores forms a negatively skewed distribution,what can you conclude 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 to draw any conclusions about students' scores.

Question 34

A professor records the number of students who are absent each day for the semester.Because this is a discrete variable,a bar graph should be used to show the frequency distribution.

Question 35

The students in a psychology class seemed to think that the midterm exam was very easy.If they are correct,what is the most likely shape for the distribution of exam scores?

A)Symmetrical
B)Positively skewed
C)Negatively skewed
D)Normal

Question 36

It is customary to list the score categories in a frequency distribution from the highest down to the lowest.

Question 37

A grouped frequency distribution table does not provide enough information to obtain a complete listing of the original set of scores.

Question 38

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

Question 39

If a set of scores covers a range of 80 points,then the grouped frequency table for the scores should use an interval width of 8 points.

Question 40

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,the first column would be a list of movies.

Question 41

A set of scores ranging from a high of 47 to a low of 6 is organized in a grouped frequency distribution table using an interval width of 5 points.If the distribution is shown in a graph,then a histogram or polygon should be used.

Question 42

The normal distribution is an example of a symmetrical distribution.

Question 43

Briefly explain what information is available in a regular frequency distribution table that is not available in a grouped table.

Question 44

A histogram is constructed so that adjacent bars touch.

Question 45

A space is left between adjacent bars in a bar graph.

Question 46

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.

Question 47

A sports historian recorded the number of times that the New York Yankees finished 1^st,2^nd,3^rd,and so on,in their division for the past 20 years.If the results are presented in a frequency distribution graph,then a histogram should be used.

Question 48

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.

Question 49

In a positively skewed distribution,the scores pile up on the left side of the distribution and taper off to the right.

Question 50

The classrooms in the Psychology department are numbered from 100 to 108.A professor records the number of classes held in each room during the fall semester.If the results were presented in a frequency distribution graph,the professor should use a bar graph.

Question 51

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.

Question 52

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