Use Excel to answer the following questions.
1. Construct a histogram and a frequency polygon for the following data.
Class Interval
Frequency
30-under 32
5
32-under 34
7
34-under 36
15
36-under 38
21
38-under 40
34
40-under 42
24
42-under 44
17
44-under 46
8
2. Are the advertising dollars spent by a company related to total sales revenue? The following data represent the advertising dollars and the sales revenues for various companies in a given industry during a recent year. Construct a scatter plot of the data from the two variables and discuss the relationship between the two variables.
Advertising (in $millions)
Sales (in $millions)
4.2
155.7
1.6
87.3
6.3
135.6
2.7
99.0
10.4
168.2
7.1
136.9
5.5
101.4
8.3
158.2
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