Is there sufficient evidence to conclude that American families with children have on average less than two children (CHILDS)?
Answer to relevant QuestionsEstimate with 95% confidence the average amount of television watched per day (TVHOURS).Estimate with 95% confidence the average American total family annual income (TFINCOME).a. The sample variance of a random sample of 50 observations from a normal population was found to be s2 = 80. Can we infer at the 1% significance level that σ2 is less than 100?b. Repeat part (a) increasing the sample size ...The job placement service at a university observed the not unexpected result of the variance in marks and work experience of the university’s graduates: Some graduates received numerous offers whereas others received far ...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 ...
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