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A local electronics firm wants to determine their average daily sales (in Dhs). A sample of...

A local electronics firm wants to determine their average daily sales (in Dhs). A sample of the sales for 36 days revealed average sales of 415,000 Dhs. Assume that the standard deviation of the population is known to be 36,000 Dhs.

The 97% confidence interval estimate for the average daily sales is ( , ). Round your answer to the nearest integer.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Given :

Mean () = 415000

Population standard deviation () = 36000

Sample size (n) = 36

Here we can use ti-83 calculator.

97% confidence interval for mean is 401979 and 428021.

​​​​​​

Step : STAT -> TESTS -> Z Interval -> put all given value and calculate.

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