QUESTION 1 I collect a random sample of size n from a population and from the data collected compute a 95% confidence interval for the mean of the population. Which of the following would produce a new confidence interval with larger width (larger margin of error) based on these same data? Use a larger confidence level. Use a smaller confidence level. Use the same confidence level but compute the interval n times. Approximately 5% of these intervals will be larger. Nothing can guarantee absolutely that you will get a larger interval. One can only say the chance of obtaining a larger interval is 0.05. QUESTION 2 To assess the accuracy of a laboratory scale, a standard weight known to weigh 1 gram is repeatedly weighed a total of n times and the mean > of the weighings is computed. Suppose the scale readings are Normally distributed with unknown mean m and standard deviation o= 0.01 g. How large should n be so that a 95% confidence interval for m has a margin of error of + 0.0001? 100 196 10,000 38,416 QUESTION 3 A medical researcher treats 100 subjects with high cholesterol with a new drug. The average decrease in cholesterol level is = 80 after two months of taking the drug. Assume that the decrease in cholesterol after two months of taking the drug follows a Normal distribution with unknown mean / and standard deviation o = 20. A 90% confidence interval for u is 80 + 2.00. 80 + 3.29. 80 + 3.92. 80 + 32.90