the percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence.
66.0 75.8 70.9 73.9 63.4 68.5 73.3 65.9
STATISTICS - PsyDAG, Saturday, April 20, 2013 at 2:07pm
Find the mean first = sum of scores/number of scores
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
Standard deviation = square root of variance
99% = mean ± 2.575 SD
I'll let you do the calculations.
STATISTICS - jo, Sunday, March 1, 2015 at 10:02pm