Prepared by Dr. Agatha Shaw, Valencia College, 9/19/2007

http://faculty.valencia.cc.fl.us/ashaw

QUICK REVIEW: CLAST SKILL IV.D.1

Interpret real-world data involving frequency and cumulative frequency tables

The table below shows a distribution of scores for a quiz in a biology class.

Quiz Score Proportion

12.0 0.25

14.0 0.15

16.0 0.20

18.0 0.30

20.0 0.10

1. Find the mean score based on the table above.

a) 12.5 b) 10.3 c) 15.7 d) 13.7

2. Find the median score based on the table above.

a) 12.0 b) 14.0 c) 16.0 d) 18.0

3. Find the mode based on the table above.

a) 12.0 b) 14.0 c) 16.0 d) 18.0

4.

Based on the above table, what percentage of families have average monthly water bill of $100

or less?

a) 45% b) 55% c) 30% d) 85%

Average Monthly

Water Bill ($)

Percentile Rank

$150

90

$125

85

$100

55

$75

20

$50

10