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February 28, 2015

February 28, 2015

Posted by **patina** on Monday, June 11, 2012 at 8:10am.

Is it unusual for the office worker to use over 15000 sheets each year?

What % of workers use at least 8000 sheets per year?

Find P30. Interpret.

In a random sample of 100 office workers, find the probability that the mean number of sheets of paper used per year does not exceed 10500.

- statistics -
**PsyDAG**, Monday, June 11, 2012 at 1:18pmZ = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. For percent, multiply by 100.

What do you mean by "P30"?

Since the last question involves a distribution of means, use:

Z = (score-mean)/SEm

SEm = SD/√n

Use the same table.

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