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  3. we must show our work. 1. a sample of 81 observati

We must show our work. 1. A sample of 81 observations is taken from a normal population...

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Basic Math

We must show our work.

1. A sample of 81 observations is taken from a normalpopulation with a standard deviation of 5. The sample meanis 40. Determine the 80% confidence interval for thepopulation mean. (Hint: Confidence Interval for aPopulation mean with population standard deviation (?)known)

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Solution Given that 40 5n 81At 80 confidence    See Answer
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