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Answer on Abstract Algebra Question for bianco perry

Question #2263
Use the given degree of confidence and sample data to construct a confidence interval for the population mean u. Assume that the poplution has a normal distribution
n=10 x=8.7, s=3.3, 95%confidence
Expert's answer
For normal distribution 95% interval Z = 1.96:

Upper limit:& x + 1.96*s/sqrt(n) = 8.7 + 1.96*3.3/sqrt(10) =10.75
Lower limit:& x - 1.96*s/sqrt(n) = 8.7 - 1.96*3.3/sqrt(10) =6.65

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