MATH questions (2)
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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