Compare the confidence intervals in Exercise 8.29. What effect does each of these actions have on the width of a confidence interval?
a. Double the sample size
b. Quadruple the sample size
Reference:
A random sample of n measurements is selected from a population with unknown mean µ and known standard deviation σ = 10. Calculate the width of a 95% confidence interval for µ for these values of n:
a. n = 100 b. n = 200 c. n = 400
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