SOLUTION: the times per week a student uses a lab computer are normally distributed with the mean on 5.9 hours and a standard deviation of 1.4 hours
find probability that the students uses
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-> SOLUTION: the times per week a student uses a lab computer are normally distributed with the mean on 5.9 hours and a standard deviation of 1.4 hours
find probability that the students uses
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Question 1079897: the times per week a student uses a lab computer are normally distributed with the mean on 5.9 hours and a standard deviation of 1.4 hours
find probability that the students uses the lab computer less than 3 hours per week
between 6 and 7 times a week
and more than 9 times a week Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! the times per week a student uses a lab computer are normally distributed with the mean on 5.9 hours and a standard deviation of 1.4 hours
find probability that the students uses the lab computer less than 3 hours per
week
z(3) = (3-5.9)/1.4 = -2.0714
P(x < 3) = P(z < -2.0714) = normalcdf(-100,-2.0714) = 0.0192
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between 6 and 7 times a week
Find the z-value of 6 and the z-value of 7
Find the probability of z between those two z-values
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and more than 9 times a week
Find the z-value of 9
Find the probability of z being greater than that z-value and z = 100.
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Cheers,
Stan H.
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