Question

5) Let X be the number of people who respond to an online survey of attitudes toward social media. Assume the survey is sent to 500 people and each has a probability of 0.40 of responding. You would like at least 250 people to respond to the survey. Estimate Prob (X 2 250), using the Normal approximation with a continuity correction. 6) College Graduation data in five Northern Midwestern states for Fall 2013 shows the graduation rate in Idaho to be 42.4% based on a cohort of 6,405 students. The regional average is 45.4%. Test whether Idaho's graduation rate is significantly below the regional average. 7) I n Sun City, Arizona, a survey gave the following number of high school dropouts in different age ranges: Age Dropouts Completers Total Dropout Rate 860 694 16-17 30 18-1966 20-21 100 22-24 148 Total | 344 | 3335 3679 | 9.4% 890 760 832 1049 1197 3.4% 87% 12.0% 12.4% 732 a) Is there a significantly lower dropout rate in the Age 16-17 category then overall? b) Is there a significantly higher dropout rate in the Age 22-24 category than overall?

Answer 1