Modern Business Statistics with Microsoft Office Excel 6th Edition by David R. Anderson Solution man

b. An incorrect generalization since the data was not collected for the entire population.
c.  An acceptable statistical inference based on the use of the word “estimate.”
d. While this statement is true for the sample, it is not a justifiable conclusion for the entire population.
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Data and Statistics
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e.  This statement is not statistically supportable. While it is true for the particular sample observed, it
is entirely possible and even very likely that at least some students will be outside the 65 to 90 range
of grades.
25. a.  There are five variables: Exchange, Ticker Symbol, Market Cap, Price/Earnings Ratio and Gross
Profit Margin.
b. Categorical variables: Exchange and Ticker Symbol
Quantitative variables: Market Cap, Price/Earnings Ratio, Gross Profit Margin
c.  Exchange variable:
Exchange  Frequency  Percent Frequency
AMEX  5  (5/25) 20%
NYSE  3  (3/25) 12%
OTC  17  (17/25) 68%
25  100%
d. Gross Profit Margin variable:
Gross Profit Margin  Frequency
0.0 – 14.9  2
15.0 – 29.9  6
30.0 – 44.9  8
45.0 – 59.9  6
60.0 – 74.9  3
25
0
10
20
30
40
50
60
70
80
AMEX NYSE OTC
Exchange

Chapter 1
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e.  Sum the Price/Earnings Ratio data for all 25 companies.
Sum = 505.4
Average Price/Earnings Ratio = Sum/25 = 505.4/25 = 20.2