1 (14 pts). A manager of a LED lightbulb factory wants to kn…

1 (14 pts). A manager of a LED lightbulb factory wants to know the population mean lift expectance of the bulbs manufactured. A sample of 28 bulbs is selected and the sample mean x– = 36900 hours and the sample standard deviation s = 594 ounces.  (a) What is the population? What is the sample? (b) Construct a 90% confidence interval for the population mean.

3 (14 pts). A polling company wanted to estimate the populat…

3 (14 pts). A polling company wanted to estimate the population proportion of adults who were in favor of tighter rules on TV content during hours when children are most likely to be watching. A sample of 1800 adults was surveyed and 1366 responded yes. (a) What is the population? What is the sample? (b) Construct a 99% confidence interval for the population proportion.