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7. Which is shorter: a 95% z-interval or a 95% t-interval for u if we know that 0 =5? A. The z-interval is shorter B.

7. Which is shorter: a 95% z-interval or a 95% t-interval for u if we know that 0 =5? A. The z-interval is shorter B. The t-interval is shorter C. Both are equal D. We cannot say

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