Q.
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