The national average SAT score is 1028. If we assume a normal distribution with a standard...
The national average SAT score is 1028. If we assume a normal distribution with a standard deviation of 92. What is the probability that a randomly selected score is less then 1100
Homework Answers
Sol:
X~N(1028,92)
the probability that a randomly selected score is less then 1100=P(X<1100)
P(Z<1100-1028/92)
P(Z<72/92)
=P(Z<0.7826)
=0.7831
ANSWER:
the probability that a randomly selected score is less then 1100=
0.7831
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