The Time X a Student Spends Learning a Computer Software

Short Answer

The time x a student spends learning a computer software package is normally distributed with a mean of 8 hours and a standard deviation of 1.5 hours. A student is selected at random.
What is the probability that the student spends less than 6 hours learning the software package?
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What is the probability that the student spends at least 8.5 hours learning the software package?
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What is the probability that the student spends between 6.5 and 8.5 hours learning the software package?
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