SOLUTION: An important factor in selling a residential property is the number of people who look through the home. A sample of 10 homes recently sold in the Halifax, Nova Scotia, area reveal

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Question 1206825: An important factor in selling a residential property is the number of people who look through the home. A sample of 10 homes recently sold in the Halifax, Nova Scotia, area revealed the mean number looking through each home was 15 and the standard deviation of the sample was 2 people. Develop a 90% confidence interval for the population mean. (Round the final answers to 2 decimal places.)

Confidence interval for the population mean is between
13.95
and
19.64
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
For 90% confidence interval, z value is 1.645. You have to know it, look it up.
z*(stddev/squareroot(n)) = the margin of error (MOE)
n is sample size.
Mean +/- MOE is the confidence interval.
15 +/- 1.645*(2/sqrt(10)) = about 13.96 to 16.04