In: Statistics and Probability
For all of these questions don't use the p value method instead use the "5 steps of hypothesis testing." Or I will get all of these wrong and I really need the help!!
4) 18.3% of incoming freshmen indicate they will major in business or a related field. A random sample of 350 incoming college freshmen were asked their preference and 65 replied they were considering business as a major. Estimate the true proportion of freshman business majors with 98% confidence.
5) The average length of a prison term in the US for white collar crime is 34.9 months. A random sample of 45 prison terms indicated a mean stay of 35.8 months with a standard deviation for the population of 8.9 months.. At α (alpha) = 0.04, is there sufficient evidence to conclude the average stay differs from 34.9 months?
6) The average 1-ounce chocolate chip cookie contains 110 calories. A random sample of 8 different brands of 1-ounce chocolate chip cookies resulted in the following calories amounts. At the α (alpha) = 0.01 level, is there sufficient evidence that the average calorie content is greater than 110 calories? 100 125 150 160 120 125 145 100