Cantu Excavating is a well-established company with thousands of employees and they want to estimate the...

Cantu Excavating is a well-established company with thousands of employees and they want to estimate the average age of their workers. A sample of 94 employees was taken. Assuming the population has a standard deviation of 6.2, we want to find a 90% confidence interval for the population mean.

If the mean of the sample is 26.3, what is the confidence interval estimate?
For full marks, your answer should be accurate to at least two decimal places.

Confidence Interval: (0 , 0)

Expert Solution

We have given that,

Sample mean =26.3
Population standard deviation=6.2
Sample size=94
Level of significance =1-0.90=0.1
Z critical value (by using Z table)=1.645

Confidence interval formula is

=(25.25,27.35)

orchestra answered 2 years ago

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