Frequency Distributions and Their Graphs

In the construction of a frequency distribution, it is a good idea to have overlapping class limits, such as 10-20, 20-30, 30-40.

• True

• False

Use the given frequency distribution to find the

(a) class width

(b) midpoints of the first class

(c) boundaries of the first class

• (a) 3

  (b) 51

  (c) 50 - 52

• (a) 2

  (b) 51.5

  (c) 50 - 52

• (a) 3

  (b) 51

  (c) 49.5 - 52.5

• (a) 2

  (b) 51.5

  (c) 49.5 - 52.5

Use the ogive to approximate the number in the sample.

• 100

• 28

• 80

• 341

What is the given table called?

• frequency table

• frequency distribution

• contingency table

• two-way table

Identify the class with the highest relative frequency.

• 95 - 105

• 105 - 115

• 115 - 125

• 125 - 135

Approximate the greatest relative frequency.

• 0.03

• 0.15

• 0.25

• 0.35

Approximate the least relative frequency.

• 0.03

• 0.15

• 0.25

• 0.35

Identify the class with the least relative frequency.

• 115 - 125

• 125 - 135

• 135 - 145

• 145 - 155

A city in the Pacific Northwest recorded its highest temperature at 91 degrees Fahrenheit and its lowest temperature at 12 degrees Fahrenheit for a particular year. Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 10 classes

• 7 - 17

• 12 - 19

• 12 - 20

• 12 - 18

Use the frequency histogram to determine the number of classes.

• 5

• 6

• 7

• 8