In planning both market opportunity and production levels, being
able to estimate the size of a market can be important. Suppose a
diaper manufacturer wants to know how many diapers a one-month-old
baby uses during a 24-hour period. To determine this usage, the
manufacturer’s analyst randomly selects 17 parents of
one-month-olds and asks them to keep track of diaper usage for 24
hours. The results are shown. Construct a 99% confidence interval
to estimate the average daily diaper usage of a one-month-old baby.
Assume diaper usage is normally distributed.
7 | 8 | 11 | 9 | 13 | 14 | 11 |
11 | 9 | 13 | 11 | 8 | 11 | 15 |
11 | 7 | 7 |
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