Use the given confidence level and sample data to find (a) themargin of error an

Question

Use the given confidence level and sample data to find (a) themargin of error and (b) the confidence interval for the populationmean . Assume that the population has a normaldistribution.                                                                            _ Life span of desktop PC: 99% confidence: n=21, x = 6.8 years,s = 2.4 years. Use the given confidence level and sample data to find (a) themargin of error and (b) the confidence interval for the populationmean . Assume that the population has a normaldistribution.                                                                            _ Life span of desktop PC: 99% confidence: n=21, x = 6.8 years,s = 2.4 years.

Explanation / Answer

Given n =21 ; mean = 6.8 and s =2.4 yrs Margin of error for 99% = 2.58*(s/n ) =2.58*(2.4/21 ) Confidence interval = mean ± 2.58*(s/n)                              = mean ± 2.58*(2.4/21 ) hope this helps you

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