Question 1

When cumulating frequencies from the bottom up,the data are discussed in terms of
A)at most
B)less than
C)at or below
D)all of the above

Accepted Answer

D

Question 2

State the problem with this simple frequency distribution. 
A)The interval width is too small.
B)The interval width is unequal.
C)The class intervals overlap.
D)The number of intervals is too small.

Accepted Answer

Overlapping class intervals result in the same data point being counted twice, leading to inaccurate results.

Question 3

Grouped data are to ungrouped data as
A)quantitative is to qualitative
B)qualitative is to quantitative
C)inferential is to descriptive
D)descriptive is to inferential

Accepted Answer

Grouped data refer to data that have been organized into predefined intervals or groups for ease of analysis. This type of data is quantitative in nature as it involves numerical measurements. On the other hand, ungrouped data refer to data that have not been organized into predefined groups and are usually qualitative in nature, involving attributes or characteristics of a population or sample. Therefore, the best choice is A, quantitative is to qualitative.

Question 4

As a general rule,a simple frequency distribution should have between
A)3 and 6 intervals
B)5 and 10 intervals
C)8 and 12 intervals
D)5 and 20 intervals

Accepted Answer

The answer of As a general rule,a simple frequency distribution...

Question 5

Ungrouped data can be distributed as
A)intervals
B)categories
C)upper and lower boundaries
D)all of the above

Accepted Answer

The answer of Ungrouped data can be distributed as
A)intervals
B)categories
C)upper and...

Question 6

A researcher distributes frequencies into the following intervals: 3-6,7-10,11-15,16-18,19-22,and 23-26.What is wrong with this frequency distribution?
A)The interval width is too small.
B)The interval width is unequal.
C)The first class interval does not begin at 0.
D)One interval is an open class.

Accepted Answer

The intervals have different widths, which can lead to misinterpretation of the data. For example, the interval 11-15 spans 5 units, while 16-18 spans only 3 units.

Question 7

Grouped data are distributed into ________,whereas ungrouped data are distributed into ________.
A)intervals;statistics
B)statistics;intervals
C)intervals;categories
D)categories;intervals

Accepted Answer

Grouped data are divided into intervals or classes, whereas ungrouped data does not have any pre-defined intervals and are represented individually without any categorization. Therefore, the correct choice is C – intervals; categories.

Question 8

Fill in the missing values for A and B in this frequency distribution table: 
A)A = 3.2,B = 13
B)A = 3.1,B = 14
C)A = 3.3,B = 13
D)There is not enough information to complete this table.

Accepted Answer

The answer of Fill in the missing values for A...

Question 9

A researcher summarizes a set of frequency data into five intervals.This is an example of a frequency distribution for
A)ungrouped data
B)grouped data
C)inferential statistics
D)population parameters

Accepted Answer

The fact that the data has been summarized into intervals indicates that it is grouped data, rather than ungrouped data where each individual data point would be listed separately. Inferential statistics and population parameters refer to broader concepts beyond the organization of the data, so they are not the best choices.

Question 10

A simple frequency distribution
A)can be used to summarize grouped data
B)can be used to summarize ungrouped data
C)summarizes the frequency of scores in a given category or range
D)all of the above

Accepted Answer

A simple frequency distribution can be used to summarize both grouped and ungrouped data. It summarizes the frequency of scores in a given category or range. Therefore, all of the choices are correct.

Question 11

A researcher distributes frequencies into the following classes: absent,tardy,present.What type of data are distributed?
A)nominal data
B)qualitative data
C)ungrouped data
D)all of the above

Accepted Answer

The answer of A researcher distributes frequencies into the following...

Question 12

To determine the interval width,we divide the ________ by the number of intervals.
A)observed range
B)exclusive range
C)real range
D)all of the above

Accepted Answer

The answer of To determine the interval width,we divide the...

Question 13

The three steps for constructing a simple frequency distribution are
A)find the observed range,find the interval width,and construct the frequency distribution
B)find the real range,count the scores,and construct the frequency distribution
C)find the real range,find the interval width,and construct the frequency distribution
D)all of the above

Accepted Answer

The observed range refers to the range of values actually observed in the data set, while the real range is the difference between the highest and lowest values that could potentially be observed. Counting the scores is not a helpful step in constructing a frequency distribution. Finding the interval width involves dividing the real range by the desired number of intervals, and constructing the frequency distribution involves grouping the data into the specified intervals and determining the frequency of scores within each interval. Therefore, the correct answer is C.

Question 14

A researcher distributes frequencies into the following intervals: 1-10,11-20,21-30,31-40,41-50,and 51 and above.What is wrong with this frequency distribution?
A)The interval width is too small.
B)The interval width is unequal.
C)The class intervals overlap.
D)One interval is an open class.

Accepted Answer

One interval (51 and above) is an open class, which means it does not have a defined upper limit. This violates the principle of having non-overlapping and exhaustive intervals. The researcher should either include a defined upper limit for the last interval or split it into a new interval with a defined upper limit.

Question 15

Which of the following requires the calculation of a real range?
A)frequency distributions for categorical
B)frequency distributions for ungrouped data
C)frequency distributions for grouped data
D)frequency distributions that do not use real data

Accepted Answer

Only frequency distributions for grouped data require the calculation of a real range, as they involve grouping data into intervals and finding the difference between the upper and lower limits of each interval to determine the range. The other options either involve categorical data (A) or do not require the calculation of range (B, D).

Question 16

The following frequency distribution is an example of 
A)grouped data
B)ungrouped data
C)categorical data
D)both B and C

Accepted Answer

This frequency distribution is not grouped into intervals, so it is an example of ungrouped data. Categorical data refers to data that can be grouped into categories or labels (e.g. hair color, eye color), but this frequency distribution represents numerical data. Therefore, the answer cannot be D.

Question 17

Grouped data can be distributed
A)as a range of values
B)with upper and lower boundaries
C)into intervals
D)all of the above

Accepted Answer

Grouped data can be represented in all of the mentioned ways. A range of values is a general way of representing data, whereas using upper and lower boundaries and intervals provide more specific and structured representation of the data. Therefore, all options can be chosen to represent grouped data.

Question 18

Which of the following is NOT a rule for constructing a simple frequency distribution?
A)The number of intervals should equal the number of values measured.
B)Each interval is equidistant.
C)No class interval overlaps.
D)Values are rounded to the same degree of accuracy measured in the original data.

Accepted Answer

The number of intervals does not necessarily have to equal the number of values measured. It is up to the researcher to decide how many intervals to use based on the range and distribution of the data.

Question 19

When cumulating frequencies from the top down,the data are discussed in terms of
A)greater than
B)at or above
C)at least
D)all of the above

Accepted Answer

The answer of When cumulating frequencies from the top down,the...

Question 20

The range of scores in each interval of a grouped frequency distribution is called the
A)simple frequency
B)interval width
C)real range
D)grouped data

Accepted Answer

The range of scores in each interval in a grouped frequency distribution is represented by the interval width. Option A is incorrect because simple frequency refers to the number of observations in each class interval. Option C is incorrect because real range refers to the difference between the highest and the lowest scores, whether or not they are included as observations in the distribution. Option D is incorrect because the term 'grouped data' refers to any form of data that has been organized into classes or intervals for the purpose of analysis.

Quiz 2: Summarizing Data: Frequency Distributions in

When cumulating frequencies from the bottom up,the data are discussed in terms of

State the problem with this simple frequency distribution.

Grouped data are to ungrouped data as

As a general rule,a simple frequency distribution should have between

Ungrouped data can be distributed as

A researcher distributes frequencies into the following intervals: 3-6,7-10,11-15,16-18,19-22,and 23-26.What is wrong with this frequency distribution?

Grouped data are distributed into ,whereas ungrouped data are distributed into .

Fill in the missing values for A and B in this frequency distribution table:

A researcher summarizes a set of frequency data into five intervals.This is an example of a frequency distribution for

A simple frequency distribution

A researcher distributes frequencies into the following classes: absent,tardy,present.What type of data are distributed?

To determine the interval width,we divide the ________ by the number of intervals.

The three steps for constructing a simple frequency distribution are

A researcher distributes frequencies into the following intervals: 1-10,11-20,21-30,31-40,41-50,and 51 and above.What is wrong with this frequency distribution?

Which of the following requires the calculation of a real range?

The following frequency distribution is an example of

Grouped data can be distributed

Which of the following is NOT a rule for constructing a simple frequency distribution?

When cumulating frequencies from the top down,the data are discussed in terms of

The range of scores in each interval of a grouped frequency distribution is called the