Sunday

April 20, 2014

April 20, 2014

Posted by **K** on Wednesday, April 3, 2013 at 1:41pm.

i dont know what to do without a population size or sample size

- statistics -
**MathGuru**, Wednesday, April 3, 2013 at 9:09pmTry z-scores.

z = (x - mean)/sd

Once you have the z-score, check out a z-table for your probability. (Remember that the problem is looking for "more than 13 minutes" when you determine the probability.)

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