Estimate with 95% confidence the average amount of television watched per day (TVHOURS).
Answer to relevant QuestionsIs there sufficient evidence to infer that the average American has more than a high school education, which is more than 12 years of education (EDUC)?Estimate with 99% confidence the average number of earners per household (EARNRS).a. Estimate σ2 with 90% confidence given that n = 15 and s2 = 12.b. Repeat part (a) with n = 30.c. What is the effect of increasing the sample size?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 ...In some states, the law requires drivers to turn on their headlights when driving in the rain. A highway patrol officer believes that less than one-quarter of all drivers follow this rule. As a test, he randomly samples 200 ...
Post your question