A random sample of 10 shipments of stick-on labels showed the following order sizes. (a) Construct a 95 percent confidence interval for the true mean order size. (b) How could the confidence interval be made narrower? (c) Do you think the population is normal? (Data are from a project by MBA student Henry Olthof, Jr.)
12,000 | 18,000 | 30,000 | 60,000 | 14,000 | 10,500 | 52,000 | 14,000 | 15,700 | 19,000 |
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