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December 20, 2014

December 20, 2014

Posted by **Janelle** on Wednesday, November 9, 2011 at 9:21am.

sample of 18 scores had a sample standard deviation 10.4. Find a 90% confidence

2

interval for the population variance. What assumption, if any, have you made in calculating this interval estimate?

- statistics -
**PsyDAG**, Wednesday, November 9, 2011 at 11:23am90% interval = mean ± 1.645 SD

SD^2 = variance

Assume normal distribution.

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