Question 8.104

7. Refer to Exercise 5.

  1. Describe what happens to the value of , as the confidence level increases, for a given sample size.
  2. Draw a sketch of the curve for sample size , and explain why the value of changes as it does.

8.2.7

(a) For a given sample size, the value of increases as the confidence level increases. (b) As the value of increases, the confidence interval becomes wider. With a wider confidence interval you can be more confident that your confidence interval contains μ.

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