Refer to the following ages at inauguration of the elected presidents of the United States (from Data Set 12 in Appendix B). Test for randomness above and below the mean. Do the results suggest an upward trend or a downward trend?
Use a 0.05 significance level with the indicated test. If no particular test is specified, use the appropriate nonparametric test from this chapter.
Answer to relevant QuestionsEach year, U.S. News and World Report publishes rankings of colleges based on statistics such as admis¬sion rates, graduation rates, class size, faculty-student ratio, faculty salaries, and peer rat¬ings of administrators. ...The table below lists weights (lb) of plastic and food disposed in one week (from Data Set 23 in Appendix B). Use rank correlation with a 0.05 significance level to test for a correlation between weights of plastic and ...In a study of 740 pay telephones in New York City underground subway stations, it was found the 229 were not functioning. Construct a 95% confidence interval estimate of the proportion of all such pay telephones that are not ...Let each subgroup consist of the 6 values within a year. Construct an R chart and determine whether the process variation is within statistical control. If it is not, identify which of the three out-of-control criteria lead ...What is the difference between a voluntary response sample and a simple random sample? Which is generally better for the use of statistical methods?
Post your question