Answer Happy

(2) According to data collected by the National Sleep Foundation, the average number of pillows used by an adult in the U.S. is 2.15 with a standard deviation of 1.20. (Virtually no one sleeps with no pillows.) We wish to determine the percentage of people who use two to four pillows. You need not answer this question, but you must briefly explain why, if you'd follow the same procedures that you used in question 8, your answer to this question would be inaccurate.