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2. The length of time that American preteens watch television each day has population mean = 80 minutes with population standard deviation = 20 minutes.

2. The length of time that American preteens watch television each day has population mean = 80 minutes with population standard deviation = 20 minutes. The data is normally distributed. What proportion of individual American preteens watch between x = 50 and x = 110 minutes of television per day?

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