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SampleSize 20 PopulationStandardDeviation 0.18 SampleMean 8.3700 SampleStandardDeviation 0.1895 SampleSize 20 SampleMean 8.3700 ConfidenceInterval ConfidenceCoefficient 0.99 ConfidenceInterval LowerLimit ConfidenceCoefficient 0.99 UpperLimit LowerLimit UpperLimit HypothesisTest HypothesizedValue 8.3

SampleSize 20 PopulationStandardDeviation 0.18
SampleMean 8.3700
SampleStandardDeviation 0.1895 SampleSize 20
SampleMean 8.3700
ConfidenceInterval
ConfidenceCoefficient 0.99 ConfidenceInterval
LowerLimit ConfidenceCoefficient 0.99
UpperLimit LowerLimit
UpperLimit
HypothesisTest
HypothesizedValue 8.3 HypothesisTest
TestStatistic HypothesizedValue 8.3
p-value(LowerTail) 0.9425 TestStatistic
p-value(UpperTail) p-value(LowerTail) 0.9591
p-value(TwoTail) p-value(UpperTail)
p-value(TwoTail)

Walmart claims the average time waiting in their checkout lines is 8.3 minutes. A random sample of 20 Walmart shoppers is taken and their time waiting in the checkout line is recorded in Excel. Based on this paragraph of text, use the correct excel output above to answer the following question. For the 99% confidence interval, find the upper (i.e., right) endpoint.

The answer is 8.4912 but i need to step by step how to find the values. Dont skip any steps also include how to find the Z score for the value

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