Answer to Question #139574 in Statistics and Probability for Lin

Question

A study of 35 gamers showed that their average score on a particular game was 90 and
the population standard deviation is 5.
(i) Find the best point estimate of the population mean.

(ii) Find the 95% confidence interval of the mean score for all gamers.

(iii) Find the 95% confidence interval of the mean score if a sample of 70 gamers is
used instead of a sample of 35.

(iv) From your answer in part (ii) and (iii), which interval is smaller?

Answer 1

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