Introduction to Statistics
PreQuiz #3
Objectives: Youi will be able to describe data using measures of variation such as the range, variance, and standard
deviation
Name___________________________________
Date __________________
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Find the range for the given data.
1) A class of sixth grade students kept accurate records on the amount of time they spent
playing video games during a one

week period. The times (in hours) are listed below.
Find the range.
22.9
13.6
9.4
19.7
25.0
30.3
26.3
15.5
22.5
19.6
1)
2) Fred, a local mechanic, gathered the following data regarding the price, in dollars, of an oil
and filter change at twelve competing service stations. Find the range.
32.95
24.95
26.95
28.95
18.95
28.95
30.95
22.95
24.95
26.95
29.95
28.95
2)
3) Each year advertisers spend billions of dollars purchasing commercial time on network
sports television. In the first 6 months of 1988, advertisers spent $1.1 billion. Who were the
largest spenders? In a recent article, listed the top 10 leading spenders (in million of
dollars):
Company A
$71.2
Company F
$27.8
Company B
60.3
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 Spring '11
 Lee
 Statistics, Standard Deviation, Variance, Company B Company C Company D Company, F Company G Company H Company I Company

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