SOLUTION: The amount of daily time that teenagers spend on a brand A cell phone is normally distributed with a given mean mc027-1.jpg = 2.5 hr and standard deviation mc027-2.jpg = 0.6 hr. Wh
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Question 983063: The amount of daily time that teenagers spend on a brand A cell phone is normally distributed with a given mean mc027-1.jpg = 2.5 hr and standard deviation mc027-2.jpg = 0.6 hr. What percentage of the teenagers spend more than 3.1 hr?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
If I read this properly, mean is 2.5 hr and sd is 0.6 hr.
z=(x-mean)/sd
=0.6/0.6, or 1
What is probability z>1?
It is 0.1587 or 16%.
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