Deck 3: Looking at Data: Frequency Distributions and Graphs

Question 1

The symbol f in an ungrouped frequency distribution is used to represent the.

A)total number of scores
B)number of the subject contributing the score
C)relative frequency of occurrence of each score
D)simple frequency of occurrence of each score

Answer 1

D

Question 2

In a grouped frequency distribution, the range of score values into which the raw scores are grouped is called the.

A)class interval
B)class range
C)score range
D)group interval

Answer 2

A

Question 3

The formula (Xhighest - Xlowest) ⁄ number of intervals provides the in a grouped frequency distribution.

A)relative frequency of a score
B)midpoint of a class interval
C)size of a class interval
D)lower and upper real limits of a class interval

Answer 3

C

Question 4

The total number of scores collected from a group of participants is identified by .

A)T
B)Total
C)N
D)S

Question 5

Dividing the difference between the largest score and the smallest score in a distribution by the number of class intervals yields the of the class interval.

A)size
B)midpoint
C)cumulative frequency
D)limits

Question 6

Listing each possible score value and then placing a tally mark next to each score for each time it occurs in a set of scores results in a(n) frequency distribution.

A)ungrouped
B)grouped
C)relative
D)cumulative

Question 7

In a(n) frequency distribution, scores are placed into.

A)simple; class intervals
B)grouped; class intervals
C)ungrouped; class intervals
D)percentage; class limits

Question 8

The scores of a subject exactly as collected and before they are analyzed statistically are called.

A)uninterpreted scores
B)basic data
C)collected data
D)raw data

Question 9

A table showing each score in a set of scores and the number of times it occurred is called a.

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

Question 10

The symbol % f is used to represent the of a score in a distribution.

A)simple frequency
B)percentage frequency
C)relative frequency
D)percentage of participants contributing scores to the distribution

Question 11

The size of a class interval in a grouped frequency distribution is represented by.

A)sz
B)i
C)c
D)f

Question 12

The number of class intervals used in constructing a grouped frequency distribution typically is between.

A)1 to 5
B)1 to 10
C)10 to 20
D)5 to 15

Question 13

Multiplying rf by 100 yields frequency.

A)percentage
B)relative
C)cumulative
D)summated

Question 14

The frequency of a particular score divided by the total number of scores in the distribution is the frequency of a score.

A)simple
B)relative
C)cumulative
D)percentage

Question 15

The formula for the percentage frequency of a score in a distribution is given by.

A)
B)
C)

Question 16

Dividing the frequency of a score by the total number of scores in the distribution of scores will yield the of a score.

A)simple frequency
B)cumulative frequency
C)percentile
D)relative frequency

Question 17

If the computed class interval for a frequency distribution is equal to 4.25, then the actual class interval used should be.

A)4.0
B)4.25
C)4.245 to 4.255
D)5.0

Question 18

Dividing the frequency of scores in an interval by the total number of scores in a grouped frequency distribution yields the grouped frequency.

A)relative
B)simple
C)cumulative
D)percentage

Question 19

For the class interval of 20-25, the lower stated limit is.

A)19.5
B)20.0
C)25.0
D)21.0

Question 20

A frequency distribution most easily allows comparisons between two distributions of scores with a different number of scores in each distribution.

A)simple
B)comparison
C)raw data
D)relative

Question 21

The percentile rank of Jaima's score on a statistics exam was 83. This value indicates that .

A)83 percent of the scores on the exam were equal to or greater than Jaima's
B)Jaima obtained 83 out of 100 on the exam
C)27 percent of the scores on the exam were less than Jaima's
D)83 percent of the scores on the exam were equal to or less than Jaima's

Question 22

The grouped percentage frequency is determined by.

A)dividing the grouped relative frequency by 100
B)adding 100 to the grouped absolute frequency
C)subtracting 100 from the grouped cumulative frequency
D)multiplying the grouped relative frequency by 100

Question 23

The midpoint of the class interval 30 to 34 is.

A)32.5
B)31.5
C)31.0
D)32.0

Question 24

The relative location of a score in a distribution is indicated by its.

A)percentile
B)symmetry
C)modality
D)skewness

Question 25

If the 30th percentile on an examination is 65, then.

A)30 percent of the people got a score of 65
B)more than 30 percent of the people failed the exam
C)30 percent of the people got a score above 65
D)30 percent of the people got a score of 65 or less

Question 26

The symbol c%f represents the frequency.

A)summed relative
B)cumulative percentage
C)summed simple
D)cumulative relative

Question 27

The formula (rf of scores in interval) × 100 provides the grouped frequency.

A)simple
B)cumulative
C)relative
D)percentage

Question 28

For the class interval of 10-15, the upper stated limit is ; whereas the upper real limit is.

A)15.0; 15.5
B)15.0; 14.5
C)14.5; 15.0
D)15.5; 15.0

Question 29

The symbol crf represents the frequency.

A)summed relative
B)cumulative percentage
C)summed simple
D)cumulative relative

Question 30

The frequency of a class interval plus the frequencies of all lower class intervals is the grouped frequency of a distribution.

A)simple
B)summed
C)cumulative
D)relative

Question 31

The midpoint of a class interval is midway between the limits of the interval.

A)implied
B)tested
C)real
D)hypothetical

Question 32

For the class interval of 10-15, the lower stated limit is ; whereas the lower real limit is.

A)9.5; 9.5
B)9.0; 10.0
C)10.0; 9.5
D)10.0; 9.0

Question 33

A percentile is.

A)the percentage of scores in a distribution equal to or greater than a particular score
B)a score at or above which a specified percentage of the scores in a distribution fall
C)a score at or below which a specified percentage of the scores in a distribution fall
D)always the midpoint of a class interval

Question 34

The grouped relative frequency of a class interval plus the sum of the relative frequencies of all lower class intervals is the frequency of a distribution.

A)summed grouped relative
B)cumulative grouped relative
C)cumulative grouped percentage
D)cumulative simple

Question 35

For the class interval of 20-25, the lower real limit is.

A)19.5
B)20.0
C)19.0
D)20.5

Question 36

If the 40th percentile on an examination is 75, then.

A)40 percent of the people got a score of 75
B)less than 40 percent of the people got a score higher than 75
C)40 percent of the people got a score of 75 or less
D)60 percent of the people got a score lower than 75

Question 37

The formula ( f of scores in interval) N provides the grouped frequency.

A)simple
B)cumulative
C)relative
D)percentage

Question 38

A percentile is used to describe the a distribution.

A)shape of
B)relative location of a score in
C)skewness of
D)symmetry of

Question 39

For the class interval of 20-25, the upper real limit is.

A)25.0
B)25.5
C)26.0
D)24.5

Question 40

The grouped percentage frequency of a class interval plus the sum of the percentage frequencies of all lower class intervals is the frequency of a distribution.

A)cumulative grouped percentage
B)cumulative grouped relative
C)summated grouped percentage
D)summated grouped relative

Question 41

In a histogram, the is represented by the width of the bar on the abscissa.

A)size of the class interval
B)relative frequency of the interval
C)percentage frequency
D)lower stated limit and the upper real limit

Question 42

If more scores are clustered at the high-score end of a distribution and only a few scores are at the low-score end, then the distribution is.

A)symmetrical and unimodal
B)asymmetrical and bimodal
C)positively skewed
D)negatively skewed

Question 43

When plotting a graph of a frequency distribution, the is/are placed on the Y axis.

A)frequency of the scores
B)scores or class intervals of the scores
C)subject identification numbers
D)value of N

Question 44

An examination that clearly distinguished between those students who knew the material and those who did not would most likely yield a distribution.

A)symmetrical
B)bimodal
C)unimodal
D)unimodal and symmetrical

Question 45

If more scores are clustered toward the low end of a frequency distribution and only a few scores are at the high end, then the distribution is.

A)unimodal
B)multimodal
C)negatively skewed
D)positively skewed

Question 46

In a histogram, the the class interval is given by the height of the bar.

A)size of
B)cumulative frequency of
C)lower stated limit and the upper real limit of
D)frequency of scores in

Question 47

The symmetrical bell-shaped frequency distribution is also known as the distribution.

A)natural
B)common
C)normal
D)modal

Question 48

A distribution in which one side is the mirror image of the other side is.

A)symmetrical
B)asymmetrical
C)unimodal
D)bimodal

Question 49

A bimodal distribution has "peaks."

A)no
B)one
C)two
D)three or more

Question 50

A bar graph is used to present data, whereas a histogram is used to present data.

A)quantitative; qualitative
B)qualitative; quantitative
C)continuous; discrete
D)statistical; population

Question 51

An examination that is so difficult that many people get low scores and only a few get high scores would create a.

A)negatively skewed distribution
B)bimodal frequency polygon
C)rectangular distribution
D)positively skewed distribution

Question 52

Connecting dots indicating the frequency at the midpoints of class intervals with straight lines yields a.

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

Question 53

Suppose an examination was very easy and all but a few students obtained a high grade on it. The frequency distribution of these scores would be.

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

Question 54

The height of a vertical bar is used to represent the frequency of occurrence of scores in a .

A)simple frequency distribution
B)stem-and-leaf plot
C)histogram
D)frequency polygon

Question 55

When plotting a graph of a frequency distribution, the is/are placed on the X axis.

A)frequency of the scores
B)scores or class intervals of the scores
C)subject identification numbers
D)value of N

Question 56

When looking at a graph, a Y-axis with no numbers.

A)is never a problem as people just don't like to look at numbers.
B)is correct as the numbers should only be listed on the X-axis.
C)could be a sign that someone is trying to mask what is really going on with the data.
D)is a good idea as it keeps people's focus on the graph.

Question 57

When thinking about the accuracy of a graph,

A)bar graphs are always the most accurate.
B)histograms are always the most accurate.
C)remember that a graph is seldom misleading.
D)remember that a graph may be misleading.

Question 58

The normal distribution is.

A)symmetrical and bell-shaped
B)symmetrical and bimodal
C)positively skewed
D)negatively skewed

Question 59

If a distribution has scores clustered more at one end than at the other, then the distribution is.

A)unimodal
B)symmetrical
C)skewed
D)bimodal