A sample of 33 airline passengers found that the average check-in time is XXXXXXXXXXBased on...

Question

A sample of 33 airline passengers found that the average check-in time is XXXXXXXXXXBased on long-term data, the population standard deviation is known to be 0.48. Find a 95% confidence interval for the mean check-in time. Use the appropriate formula and verify your result using the Confidence Intervals workbook.

Robert · Accepted Answer

Here we have 
Go to Add-Ins, then MegaStat, then Confidence Intervals/ Sample size...Following is the screen shot:
A pop up window will open. Enter the information. Following is the screen shot:
Click ok. Following is the output:
Confidence interval - mean
95% confidence level
2.167 mean
0.

A sample of 33 airline passengers found that the average check-in time is XXXXXXXXXXBased on long-term data, the population standard deviation is known to be 0.48. Find a 95% confidence interval for...

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