BSTAT 3321 EXAM 2 questions and answers
graded A+ updated
1. Calculate the following values. A. 7!=
7*6*5*4*3*2*1=
5040
3!= 3*2*1= 6
B. 7C3= 7!/(4!*3!)=35
C. 7P3= 7!/4!= 210
2. Let P(A) = 0.57, P(B) = 0.23, and P(A )B) = 0.03. No because P(A | B)
Are A and B independent events? `P(A). Correct
3. Let P(A) = 0.57, P(B) = 0.23, and P(A )B) = 0.03. No because P(A )B) `0.
Are A and B mutually exclusive events?
4. Let P(A) = 0.57, P(B) = 0.23, and P(A )B) = 0.03. 1-(0.57+0.23-0.03)=
What is the probability that neither A nor B takes 0.23
place? (Round your answer to 2 decimal
places.)
5. Before flipping a fair coin, Sunil assesses that he has a Classical
probability
50% chance of obtaining tails.
6. At the beginning of the semester, John believes he has Subjective
probability
a 90% chance of receiving straight A's.
7. A political reporter announces that there is a within the
47% chance that the next person to come out sample
of the con- ference room will be a Republican, space S, is
since there are 83 Republicans and 92 the event
Democrats in the room. consisting of
all out-
8. The complement of an event A, denoted by AC,
1/
5
, BSTAT 3321 EXAM 2 questions and answers
graded A+ updated
comes of A that are not in S. Empirical probability
9. The total probability rule is useful only when
the un- conditional probability is expressed in
terms of prob-
False
False
2/
5
graded A+ updated
1. Calculate the following values. A. 7!=
7*6*5*4*3*2*1=
5040
3!= 3*2*1= 6
B. 7C3= 7!/(4!*3!)=35
C. 7P3= 7!/4!= 210
2. Let P(A) = 0.57, P(B) = 0.23, and P(A )B) = 0.03. No because P(A | B)
Are A and B independent events? `P(A). Correct
3. Let P(A) = 0.57, P(B) = 0.23, and P(A )B) = 0.03. No because P(A )B) `0.
Are A and B mutually exclusive events?
4. Let P(A) = 0.57, P(B) = 0.23, and P(A )B) = 0.03. 1-(0.57+0.23-0.03)=
What is the probability that neither A nor B takes 0.23
place? (Round your answer to 2 decimal
places.)
5. Before flipping a fair coin, Sunil assesses that he has a Classical
probability
50% chance of obtaining tails.
6. At the beginning of the semester, John believes he has Subjective
probability
a 90% chance of receiving straight A's.
7. A political reporter announces that there is a within the
47% chance that the next person to come out sample
of the con- ference room will be a Republican, space S, is
since there are 83 Republicans and 92 the event
Democrats in the room. consisting of
all out-
8. The complement of an event A, denoted by AC,
1/
5
, BSTAT 3321 EXAM 2 questions and answers
graded A+ updated
comes of A that are not in S. Empirical probability
9. The total probability rule is useful only when
the un- conditional probability is expressed in
terms of prob-
False
False
2/
5
