Could you provide the excel spreadsheet so that I can input #s and find the lower limit and upper limit of the confidence interval.
A sample question is:
Suppose that a random sample of eleven recently sold houses in a certain city has mean sales price of $290,000, with a standard deviation of $7,000. Under the assumption that house prices are normally distributed , find a 95% confidence interval for the mean sales price of all houses in this community.
This solution gives the step by step method for computing confidence interval.