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December 21, 2014

December 21, 2014

Posted by **Sandy** on Tuesday, February 26, 2013 at 1:16pm.

a) Construct a 95% conf. interval estimate of the mean SAT score.

b) Is a 99% conf. interval estimate of the mean SAT score wider than the 95% conf. interval estimate you got from part (a)? Why?

- Statistics -
**PsyDAG**, Wednesday, February 27, 2013 at 8:51pm95% = mean ± 1.96 SEm

SEm = SD/√n

99% = mean ± 2.575 SEm

This should allow you to answer the questions.

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