Question
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 hour. A student is randomly selected.
a. Find the probability that a student uses a lab computer less than 4 hours per week.
b. Find the probability that a student uses a lab computer between 5 and 7 hours per week.
a. Find the probability that a student uses a lab computer less than 4 hours per week.
b. Find the probability that a student uses a lab computer between 5 and 7 hours per week.
Answers
PsyDAG
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.
james
2.376
Anonymous
25