PART B: WRITTEN QUESTIONS 1. In a report on why e-shoppers abandon their online sale transactions, a study found that "pages took me much time to load" and "site was too confusing to me so that I couldn't find the product" were the two main complaints heard most often. Based on 36 customers' responses, the average time to complete online order was 4.3 minutes. Assuming o = 2.4, construct an 80% confidence interval for u, the average completion time for an online order. Interpret the result in terms of the question. 2. A sample of 8 items has an average fat content of 18.6 grams and a sample standard deviation of 2.4 grams. Assuming that fat content is normally distributed, construct a 99% confidence interval for u. Interpret the result in terms of the question. 3. A state job service employee wishes to estimate the mean number of people who register with the service each week. How many weeks should be sampled in order to estimate u, the mean number of weekly registrants? The employee would like the margin of error to be less than 0.5 with probability of 0.95. Past records show the weekly standard deviation to be 2.5