A state legislator wishes to survey residents of her district to see what proportion of the registered ers are aware of her position on using state funds to pay for a new Entertainment Center. What sample e is necessary if the 90% CI for population proportion to be within 7% of the true proportion?

The Humane Society is interested in finding out how many households in America have at least one cat. How many households must be surveyed to be 95% confident that the estimate will be within 4% of the true population percentage?

It’s assumed that students need to stay awake more to study during finals week.  One way to measure this is how much coffee is consumed during Finals week at night.  A local coffee house near APU counted the number of cups of coffee sold per hour during Finals week after 6 p.m.  We randomly select ten (10) hours of sales records during Finals week and find out that the following number of cups of coffee were consumed: 18, 17, 22, 14, 17, 20, 22, 24, 15, 15 By comparison, the sales records from a previous week were used as a comparison.  The following number of cups of coffee were consumed over a seven (7) hour period: 9, 13, 5, 15, 17, 10, 11 a. Determine what is the appropriate statistical procedure, with a brief explanation (one sentence) as to why this is the appropriate procedure. b. State the null hypothesis. c. Execute the proper calculations with the appropriate procedures. d. Present a graph when appropriate of your results. e. Include any appropriate post-hoc tests. f. State…

A scientist studied the spread of AIDS and concluded that 24% of people contracted the disease. There is a problem with this conclusion. What should the correct conclusion state?