ECO 302-At a college, 65 percent of the students are
ECO 302-At a college, 65 percent of the students are
Subject: Mathematics / Statistics
Question
. At a college, 65 percent of the students are female and 45 percent of the students receive a grade of C. About 25 percent of the students are female and not C students. Use this contingency table.
GenderGrade
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C
Not C or
Female (F)
0.25
0.65
Male (M)
0.45
If a randomly selected student is male, what is the probability he is a “Not C” student?
Some of you just answered 0.30, but that is the joint probability of male and “Not C”, not the conditional probability of Not C given male. What the question is asking is the probability of “Not C” given “M”.
5. Events A and B are independent events. If P(A) = 0.5, and P(B) = 0.6, determine P(A B), that is, the probability of A or B.
