What is the probability of a randomly selected internet

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1. GIL internet services record customer usage patterns. Historically they have found the duration of an internet session is normally distributed with a variance of 550.2 minutes2. What is the probability of a randomly selected internet session being more than half an hour either side of the mean internet session duration? (4 decimal places)

2. The marks on a midterm test are normally distributed with a mean of 72.3 and a standard deviation of 10.2. Find the probability that a class of 38 has an average less than 70. (4 decimal places)

Reference no: EM132378931

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