Sub: Statistics Topic: Probability
Find the required probability for normal distribution.
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1. The scores on the verbal portion of the SAT have a normal distribution with a mean of 500
and standard deviation of 100.
-What is the proportion of people that score at least 700?
-If a student who took the SAT is randomly chosen what is the probability that the student
scores at most 350 on the verbal portion?
-George scored higher than about 62% of the people on the verbal portion of the SAT. What
is George’s score?
2. The average number of hours of sleep per night that a college freshman gets is 6.5 with a
standard deviation of 1.8 hours. If 35 college freshmen are randomly chosen find the