# Probability of a student useing a lab computer

The time per week a student uses a lab computer is normally distributed, with a mean of 6.2 hours and a standard deviation of 0.9 hours. A student is randomly selected. Find the probability that the student uses a lab computer between 5.7 and 6.5 hours per week and the probability that the student uses a lab computer more than 5.4 hours per week.

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#### Solution Preview

P[ 5.7 < X < 6.5 ] =

= P [ (5.7-6.2)/0.9 < Z < ...

#### Solution Summary

The solution calculates the probability of the number of hours spent on a lab computer by a student.

$2.19