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September 16, 2014

September 16, 2014

Posted by **RACHELLE** on Friday, April 27, 2012 at 10:56pm.

A) determine the percentage of finishers with times between 45 and 75 min

B) determine the percentage of finshers less than 80 min

C) obtain the 30th percentile

D) find the 8th decile

- STATS -
**PsyDAG**, Saturday, April 28, 2012 at 8:17pmZ = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

Reverse the process for the last 2 problems.

30th percentile = lowest 30%

8th decile = lowest 80%

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