A CI is desired for the true average stray-load loss (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1,500 rpm. Assume that stray-load loss is normally distributed with = 3.0.

a. Compute a 95% CI for when n= 25 and x = 58.3.

b. Compute a 95% CI for when n = 100 and x= 58.3.

c. Compute a 99%CI for when n = 100 and x=58.3.

d. Compute an 82% CI for when n=100 and x = 58:3.

e. How large must n be if the width of the 99% interval for is to be 1.0?