Homework Help: Statistics

Posted by Joe on Wednesday, November 9, 2011 at 6:57am.

Ticket sales for opening night of a movie have a mean of $2100 with a standard deviation of $450. Assume these ticket sales follow a normal distribution. If a movie is selected randomly, what is the probability that opening night ticket sales are more than $1620?

Statistics - PsyDAG, Wednesday, November 9, 2011 at 11:27am
Z = (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.

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