Question: =+An estimated variance s 2 n results from replacing the 2> s; by the s 2> s; n can then be standardized to

=+An estimated variance s 2

n

 results from replacing the

2>

s; by the s 2>

s; 

n can then be standardized to obtain a z variable from which the confidence interval



n 6 (z crit)s n

 is obtained. Suppose that samples of

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