Can we infer that the average American has completed more than 12 years of education (EDUC)?
Answer to relevant QuestionsEstimate with 95% confidence the mean number of days in a typical week (DAYS8) spent by American adults watching the national news on television, not including sports.The weights of a random sample of cereal boxes that are supposed to weigh 1 pound are listed here. Estimate the variance of the entire population of cereal box weights with 90%confidence.One problem facing the manager of maintenance departments is when to change the bulbs in streetlamps. If bulbs are changed only when they burn out, it is quite costly to send crews out to change only one bulb at a time. This ...Suppose that you used the sample size calculated in Exercise 12.89 and found p̂ = .5.a. Estimate the population proportion with 90% confidence.b. Is this the result you expected? Explain.c. If you were hired to conduct this ...An important decision faces Christmas holiday celebrators: buy a real or artificial tree? A sample of 1,508 male and female respondents 18 years of age and over was interviewed. Respondents were asked whether they preferred ...
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