Exercise 8-4 Algo

Consider a population with a population standard deviation of 15.3. In order to compute an interval estimate for the population mean, a sample of 41 observations is drawn. (You may find it useful to reference the z table.) a. Is the condition thatx is normally distributed satisfied?

multiple choice (select one)

• Yes
• No

b. Compute the margin of error at a 99% confidence level. (Round final answer to 2 decimal places.)

c. Compute the margin of error at a 99% confidence level based on a larger sample of 340 observations. (Round final answer to 2 decimal places.)

d. Which of the two margins of error will lead to a wider confidence interval?

multiple choice (select one)

• 99% confidence with n = 41.
• 99% confidence with n = 340.