Frequency Distributions and Their Graphs

What is another name for the ogive?

• Histogram

• Frequency Polygon

• Cumulative frequency graph

• Pareto chart

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

The type of graph used to represent data is determined by the type of data collected and by the researcher's purpose.

• True

• False

Except for rounding errors, relative frequencies should add up to what sum?

• 0

• 1

• 50

• 100

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

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