Ratings of viewership for the three major networks

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Reference no: EM13982689

The ratings of viewership for the three major networks during prime time recently were as follows. Also shown is the proportion of viewers watching each program.

Program	Network	Rating	Proportion
20/20	ABC	13.8	0.44
CSI	CBS	10.4	0.33
Law and Order	NBC	7.5	0.23

a. What is the mean rating given a program that evening?

b. How many standard deviations above or below the mean is the rating for each one of the programs?

Reference no: EM13982689

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