Kizspy | Question: 7
(Choose 1 answer)
(See picture)
A. 62
B. 44
C. 16
D. 11
A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation σ = 20. How large must the sample size be if the length of the 95% CI is to be 10?
Let Z0.025 1.960; 20.05 1.645
