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December 20, 2014

December 20, 2014

Posted by **heather** on Wednesday, October 21, 2009 at 5:10pm.

Before 70 80 92 99 93 97 76 63 68 71 74

After 69 79 90 96 91 95 75 64 62 64 76

- statistics -
**MathGuru**, Thursday, October 22, 2009 at 9:26pmFor a 99% confidence interval, you can use + or - 2.58 from a z-table. You will need to find the correct formula to use for the mean difference.

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