2-1

Question 1

frequency distribution

Answer 1

is the organization of raw data in table form, using classes
and frequencies.

Question 2

raw data

Answer 2

When the data are in original form

Question 3

class

Answer 3

Each raw data value is placed into a quantitative or qualitative category

Question 4

categorical frequency distribution

Answer 4

is used for data that can be placed in specific cate-
gories, such as nominal- or ordinal-level data.

Question 5

grouped frequency distribution.

Answer 5

When the range of the data is large, the data must be grouped into classes that are more
than one unit in width,

Question 6

lower class limit

Answer 6

it represents
the smallest data value that can be included in the class

Question 7

upper class limit

Answer 7

represents the largest data value that can be included in the class.

Question 8

class boundaries

Answer 8

The numbers in the second column

Question 9

class width

Answer 9

for a class in a frequency distribution is found by subtracting
the lower (or upper) class limit of one class from the lower (or upper) class limit of the
next class.

Question 10

open-ended

Answer 10

the first class has no specific lower limit, or the last class has no specific upper
limit.

Question 11

open-ended
distribution

Answer 11

A frequency distribution with an open-ended class

Question 12

cumulative
frequency distribution

Answer 12

a distribution that shows the number of data values less than or
equal to a specific value (usually an upper boundary)

Question 13

ungrouped frequency distribution

Answer 13

When the range of the data values is relatively small, a frequency distribution can be
constructed using single data values for each class.