Q4. A CI is desired for the true average stray-load loss µ (watts) for a certain type of induction motor when the line currentis held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with σ = 3.0.=(a) Compute a 82% CI for u when n = 100 and x(b) How large must n be if the width of the 99% interval for u is to be 1.0?58.3. Justify your choice of critical value.

Sample size n =100 Sample mean=58.3 Population standard deviation =3

Answered: held at 10 amps for a speed of 1500…

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held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with o = 3.0. (a) Compute a 82% CI for u when n = 100 and 7 = 58.3. Justify your choice of critical value. (b) How large must n be if the width of the 99% interval for u is to be 1.0?