Page 1 of 5
Review for Test 1
1. (Chapter 2) The following data represent the pulse rate
of 16 randomly selected males after stepping up and down
on a 6 inch platform for 3 minutes. Pulse is measured in
beats per minute.
72
86
88
96
115
120
128
129
136
138
138
143
146
151
154
169
a)
What is the variable of interest? Is it categorical or
quantitative? If quantitative, is it discrete or continuous?
b)
Construct a stemandleaf plot.
c)
What percentage of the pulse rates are between 110
and 149.9 beats per minute?
d)
What percentage of the pulse rates are at least 110
beats per minute?
e)
Compute the sample mean and median pulse. What do
these values tell you about the shape of the distribution?
f)
Compute the range and sample standard deviation.
g)
Compute Q1, Q3, and IQR.
h)
Are there any outliers in the data set using the
quartiles?
i)
Calculate the zscore for 72.
Page 2 of 5
2. (Chapter 2) The data values below are the years of
service for a sample of n = 10 employees at a company
as reported by data entry personnel:
10
13
14
31
11
16
17
19
8
203
(Note: the 10
th
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 Spring '08
 smith
 Statistics, Standard Deviation, gas stations

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