CHAPTER 3
DESCRIBING DATA: NUMERICAL MEASURES
Exercise 3.3
Check your answers against those in the ANSWER section.
A sample of the amount of rent paid for one bedroom apartments of similar size near the University of
Akron are:
$335
$515
$385
$635
$578
$500
$535
$462
$410
$373
$410
$430
a.
What is the range? Interpret your results.
b.
Compute the mean deviation.
Exercise 3.4
Check your answers against those in the Answer section.
The annual exports of 50 mediumsized manufacturers were
organized into a frequency distribution. (Exports are in $ millions).
Compute the mean.
Exports
Frequenc
y
$6 up to $9
2
$9 up to $12
8
$12 up to $15
20
$15 up to $18
14
$18 up to $21
6
Exercise 3.5
Check your answers against those in the ANSWER section.
During the past month an electronics store sold 31 model EL733 calculators for $30 each, 42 model
EL480 calculators for $10 each, 47 model FX115 calculators for $20 each, and 63 model BA35
calculators for $24 each.
What is the weighted mean price of the calculators?
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 Spring '10
 Frank
 Political Science, Standard Deviation, Media, Mean, Answer Section

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