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September 2, 2014

September 2, 2014

Posted by **michelle** on Monday, September 26, 2011 at 10:30am.

- statistics -
**PsyDAG**, Monday, September 26, 2011 at 11:05amWhat is your question?

- statistics -
**Kimberly Rubino**, Tuesday, September 27, 2011 at 11:26amYes, it would be unusal for the mean of a sample of 3 to be 115 or more because there is only a 4.18% chance for this to happen.

P(X >= 115)

= P(X >= (115 - 100) / sqrt(15^2 / 3))

= P(X >= 1.732050808)

= 0.0418

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