Question

1. A study of a recent diet plan claimed that the amounts of weight lost by all persons using the plan had a mean of 23.9 pounds and a standard deviation of 7.2 pounds.

   Random samples of size 54 are taken from persons using this plan. What would be the mean of the distribution of the sample means? Round to two decimal places, if necessary.

Answer 1

Solution :

Given that ,

mean = = 23.9

standard deviation = = 7.2

n = 54

=   = 23.9

= / n = 7.2 / 54 = 0.9798

Answer = Mean of the distribution of the sample means is = 23.90