Concept explainers
Weekly Sales Table 8 gives the relative frequency distribution for the weekly sales of two businesses.
Table 8
Relative Frequency |
||
Sales | Business A |
Business B |
100 |
.1 |
0 |
101 |
.2 |
.2 |
102 |
.3 |
0 |
103 |
0 |
.2 |
104 |
0 |
.1 |
105 |
.2 |
.2 |
106 |
.2 |
.3 |
(a) Compute the population mean and the variance for each business.
(b) Which business has the better sales record?
(c) Which business has the more consistent sales record?
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