Mathematics, 03.04.2021 05:00 reed361
The amount of time Mary spends on the phone each month can be thought of as a random variable that is approximately normal distributed. Mary spends an average of 40 hours on her phone with a standard deviation of 4 hours. Find the probability that Mary spends between 30 and 40 hours on the phone.​
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The amount of time Mary spends on the phone each month can be thought of as a random variable that i...
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