A CI is desired for the true average (i.e. population mean) stray-load loss u in watts for a certain type of induction motor when the line current is 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 95% CI for µ when n= 25 and x = 58.3 b. Compute a 95% CI for µ when n = 100 and x = 58.3 c. Compute a 99% CI for µ when n= 100 and x = 58.3 d. How large must n be if the width of the 99% interval for u is to be 1.0?

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3. A CI is desired for the true average (i.e. population mean) stray-load loss u in watts for a certain
type of induction motor when the line current is 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 95% CI for µ when n= 25 and x = 58.3
b. Compute a 95% CI for µ when n = 100 and x = 58.3
c. Compute a 99% CI for µ when n = 100 and x = 58.3
d. How large must n be if the width of the 99% interval for µ is to be 1.0?
Transcribed Image Text:3. A CI is desired for the true average (i.e. population mean) stray-load loss u in watts for a certain type of induction motor when the line current is 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 95% CI for µ when n= 25 and x = 58.3 b. Compute a 95% CI for µ when n = 100 and x = 58.3 c. Compute a 99% CI for µ when n = 100 and x = 58.3 d. How large must n be if the width of the 99% interval for µ is to be 1.0?
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