Question: 1.Which is shorter: a 95% z -interval or a 95% t -interval for if we know that =s? A.The z-interval is shorter B.The t-interval is

1.Which is shorter: a 95% z-interval or a 95% t-interval for if we know that =s?

A.The z-interval is shorter

B.The t-interval is shorter

C.Both are equal

D. We cannot say

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