Question: To construct a confidence interval using the given confidence level, do which ever of the following is appropriate. (a) Find the critical value z /2

To construct a confidence interval using the given confidence level, do which ever of the following is appropriate.

(a) Find the critical value z/2

(b) Find the critical value t/2

(c) state that neither the normal nor the t distribution applies.

99% n = 400; is unknown; population appears to be skewed

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