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.

Question

2 years ago

8

5 hr and standard deviation mc027-2.jpg = 0.6 hr. What percentage of the teenagers spend more than 3.1 hr?

2 answers:

Anarel [89] · Answer 1 · 2022-07-30T03:41:46+03:00

7 0

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%.

ivolga24 [154] · Answer 2 · 2022-07-30T01:31:22+03:00

4 0

16% is the answer Fam.....................................