A survey of 25 randomly selected customers found the ages shown (in years). 36 40 20 28 11 26 38 19 31 26 47 49 30 32 34 38 27 26 49 35 38 40 39 28 43
The mean is 33.20 years and the standard deviation is 9.41 years. a) What is the standard error of the mean? b) How would the standard error change if the sample size had been 225 instead of 25? 36 40 20 28 110- 26 38 19 31 26 47 49 30 32 34 38 27 26 49 35 38 40 39 28 43