Posted by **Anonymous** on Thursday, March 10, 2011 at 7:42pm.

The number of viewers of American Idol has a mean of 21 million with a standard deviation of 10 million. Assume this distribution follows a normal distribution. Refer to the table in Appendix B.1. What is the probability that next week's show will:

(a) Have between 22 and 31 million viewers? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)

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