Business Statistics -- 2 Organizing Data

What is the midpoint of the first class?

• 10

• 20

• 15

• 30

• 40

What is the relative frequency of the first class?

• 0.15

• 0.3

• 0.1

• 0.2

• 0.4

What is the cumulative frequency of the second class interval?

• 25

• 40

• 15

• 50

• 60

What was the lowest number in the data set?

• 0

• 10

• 7

• 2

• 1

A person has decided to construct a frequency distribution for a set of data containing 60 numbers. The lowest number is 23 and the highest number is 67. If 5 classes are used, the class width should be approximately_

• 4

• 12

• 8

• 5

• 9

The following represent the ages of students in a class:

19, 23, 21, 19, 19, 20, 22, 31, 21, 20

If a stem and leaf plot were to be developed from this, how many stems would there be?

• 2

• 3

• 4

• 5

• 10