Four hundred draws are made at random with replacement from a box. The average of the draws is 28.5 and the SD is 20. Someone claims that the average of the box
equals 26.5. Is this plausible?
Find P and decide whether the average of the box equals 26.5 or is more than 26.5.
Selected Answer: P = 97.72%, average equals 26.5
Answers:
P = 2.28%, average is more than 26.5
P = 97.72%, average is more than 26.5
P = 97.72%, average equals 26.5
P = 10%, average is more than 26.5
P = 10%; average equals 26.5