Question 10 Multiple Choice Worth 1 points)
1 answer:
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1
change 1 to an improper fraction =
to divide change ÷ to × and turn the divisor upside down
÷
=
×
= =
= 1
Answer:
4.72 hours/day
Step-by-step explanation:
Mean time spent watching TV (μ) = 2.8 hours a day
Standard deviation (σ) = 1.5 hours a day
The 90th percentile (upper 10%) of a normal distribution has an equivalent z-score of roughly z = 1.282. The minimum time spent watching TV, X, at the 90th percentile is:
On a typical day, you must watch at least 4.72 hours of TV to be in the upper 10%.