b) All Things Bright, a light manufacturing company makes a light bulb whose life, X, in hours, follows a normal distribution i.e. X N(u, o). Historical data showed that the standard deviation of the...

b) All Things Bright, a light manufacturing<br>company makes a light bulb whose life, X, in<br>hours, follows a normal distribution i.e.<br>X N(u, o). Historical data showed that the<br>standard deviation of the life of a bulb produced<br>by this company is 32.6 hours. How large a<br>sample is required so that x ± 6 is a 99%<br>confidence interval for , the mean life of a bulb?<br>

Extracted text: b) All Things Bright, a light manufacturing company makes a light bulb whose life, X, in hours, follows a normal distribution i.e. X N(u, o). Historical data showed that the standard deviation of the life of a bulb produced by this company is 32.6 hours. How large a sample is required so that x ± 6 is a 99% confidence interval for , the mean life of a bulb?

Jun 07, 2022

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b) All Things Bright, a light manufacturing company makes a light bulb whose life, X, in hours, follows a normal distribution i.e. X N(u, o). Historical data showed that the standard deviation of the...

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