From a random sample of 36 fish caught in a sample, the mean length  X and sample standard deviation (sd) were found to be 30 cm and 6 cm respectively. If at 95% confidence level z is 1.96, then the mean length of fish in this population is in the range :

A 27 < X < 33

B 27.5 < X < 32.5

C 24 < X < 36

D 28.04 < X < 32

Answer & Explanation
Answer:28.04 < X < 32

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Environmental Studies Short Question | Gkseries