Environmental Studies Short Question | Gkseries

Q.

In a random sample of x516, the mean (X) is 40, and the standard deviation (sd) is 4.0. The 95% confidence interval (Z51.96) for the mean is :

[A] 64.0
[B] 61.96
[C] 60.25
[D] 60.30
Answer & Explanation

Answer: 61.96

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