In Exercises 5–20, assume that the two samples are independent simple random samples selected from
16. Bad Stuff in Children’s Movies Data Set 11 “Alcohol and Tobacco in Movies” in Appendix B includes lengths of times (seconds) of tobacco use shown in animated children’s movies. For the Disney movies, n = 33,
a. Use a 0.05 significance level to test the claim that Disney animated children’s movies and other animated children’s movies have the same mean time showing tobacco use.
b. Construct a confidence interval appropriate for the hypothesis test in part (a).
c. Conduct a quick visual inspection of the listed times for the non-Disney movies and comment on the normality requirement. How does the normality of the 17 non-Disney times affect the results?
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ELEMENTARY STATISTICS PKG. F13
- 3arrow_forwardUntitled Section 21- Which of the following statements is true? * a. When the variance of the OLS estimator increases, the standard error decreases, and the t-statistic increases b. When the variance of the OLS estimator increases, the standard error increases, and the t-statistic decreases C. When the variance of the OLS estimator inereases, the standard error increases, and the t-statistc increases d. When the variance of the OLS estimator decreases, the standard error decreases. and the t-statistic decreasesarrow_forwardcalculate the mean, median, mode, variance and standard deviationarrow_forward
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- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill