The amount of daily time that teenagers spend on a brand A cell phone is normally distributed with a given mean μ = 2.5 hr and

Question

The amount of daily time that teenagers spend on a brand A cell phone is normally distributed with a given mean μ = 2.5 hr and standard deviation o = 0.6 hr. What percentage of the teenagers spend more than 3.1 hr?
O 5%
O 10%
O 16%
O  32%

Kunduz · Accepted Answer

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