Medical MCQ - In a class, the mean weight of 4 students is 90 kg and standard deviation is 30, then 95% confidence interval would be accordingly:

In a class, the mean weight of 4 students is 90 kg and standard deviation is 30, then 95% confidence interval would be accordingly:

60-80

30-150

60-120

70-110

Question Category:

Correct Answer:

30-150

Description:

Here, Mean = 90 ; Standard deviation = 30 95% confidence interval = Mean +/- 2 S.D Hence, 90+ (2x30) = 90+60 = 150 90- (2x30) = 90-60 = 30

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