You want to estimate the mean amount of annual tuition being paid by current full-time college students in the United States. First use the range rule of thumb to make a rough estimate of the standard deviation of the amounts spent. It is reasonable to assume that tuition amounts range from $0 to about $45,000. Then use that estimated standard deviation to determine the sample size corresponding to 99% confidence and a $100 margin of error. Does the resulting sample size seem practical? Find the sample size required to estimate the population mean.
Answer to relevant QuestionsRefer to Data Set 1 in Appendix B and find the maximum and minimum pulse rates for males, then use those values with the range rule of thumb to estimates. How many adult males must you randomly select and test if you want to ...Construct the confidence interval for Exercise assuming that s is known to be 0.366 ppm. Find the confidence interval using the known value of S. The dotplot below depicts individual digits selected in the Pick 4 lottery from different states. Can the original list of individual sample digits be identified? Can the sample data be used to construct a 95% confidence ...A container of car antifreeze is supposed to hold 3785mL of the liquid. Realizing that fluctuations are inevitable, the quality-control manager of the Taconic Chemical Company wants to be quite sure that the standard ...In a Gallup poll of 557 randomly selected adults, 284 said that they were underpaid. a. Identify the best point estimate of the percentage of all adults who say that they are underpaid. b. Construct a 95% confidence interval ...
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