A group of 26 individuals, randomly selected from those attending a dinner for a local charity group,

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A group of 26 individuals, randomly selected from those attending a dinner for a local charity group, were surveyed, and their ages were noted as follows:

20 32 34 29 30 30 30 14 29 11 38 22 44 48 26 25 22 32 35 44 35 42 44 44 44 48 The mean was 32.77 years, and the standard deviation was 10.195 years.

a) What is the standard error of the mean?

b) How would the standard error change if the sample size had been tripled? (Assume that the sample standard deviation did not change.)

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