According to a survey, high school girls average 100 text messages daily. Assume the population standard...

According to a survey, high school girls average 100 text messages daily. Assume the population standard deviation is 20 text messages. Suppose a random sample of 50 high school girls is taken.

What is the probability that the sample is more than 105?
Please provide an answer with 3 decimal point.

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orchestra answered 2 years ago

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