Homework Help: statistics

Posted by UG on Tuesday, November 8, 2011 at 1:25am.

The owner of a computer repair shop has determined that their daily revenue has mean $7200 and standard
deviation $1200. The daily revenue totals for the next 30 days will be monitored. What is the probability that
the mean daily revenue for the next 30 days will exceed $7000?

statistics - PsyDAG, Tuesday, November 8, 2011 at 10:18am
Z = (mean1 - mean2)/SEm

SEm = SD/√n

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.

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