Exam 2 Stats1200.pdf file:///C:/Users/HP/Desktop/New%20folder%20(4)/Exam%202%20S
Stats 1200 Exam 2 Questions & Answers
1. A biologist claims that nearly 45 percent of all Americans have brown eyes.
A random sample of
n=90 Mizzou students found 18 with brown eyes. Give the numerical value of the
statistic
^
P
^
P=
Answer 0.2
2. Probability is a measure of how likely an event is to occur. Match one of the
probabilities that follow with each statement of likelihood given.
1. This event is very likely to occur, but is not certain to occur.
2. This event is very unlikely to happen, but it will occur once in a while in a
long sequence of trials.
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3. This event is impossible. It will never happen.
4. This event will occur a little less than half the time over a long sequence of
trials.
A. 0.42
B. 0.01
C. 0.96
D. 0
Answe
rC B
D
A
3. (a) If the knowledge that an event A has occurred implies that a second
event B cannot occur, then the events A and B are said to be
A. Collectively Exhaustive
B. Mutually Exclusive
C. The sample space
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D. Independent
(b) If event A and event B are as above and event A has probability 0.5 and
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event B has probability 0.4, then the probability that A or B occurs is
Answer B
0.5 + 0.4
4. Government data assign a single cause for each death that occurs in the
United States. (Thus, in government terminology, causes of death are mutually
exclusive.) In a certain city, the data show that the probability is 0.35 that a
randomly chosen death was due to cardiovascular (mainly heart) disease, and
0.15 that it was due to cancer.
(a) The probability that a death was due either to cardiovascular disease or to
cancer is
(b) The probability that the death was not due to either of these two causes is
Answer 0.35+0.15
0.5
5. Blood Type O A B AB
Probability 0.12, 0.35, 0.12, ?
(a) Maria has type B blood. She can safely receive blood transfusions from
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Stats 1200 Exam 2 Questions & Answers
1. A biologist claims that nearly 45 percent of all Americans have brown eyes.
A random sample of
n=90 Mizzou students found 18 with brown eyes. Give the numerical value of the
statistic
^
P
^
P=
Answer 0.2
2. Probability is a measure of how likely an event is to occur. Match one of the
probabilities that follow with each statement of likelihood given.
1. This event is very likely to occur, but is not certain to occur.
2. This event is very unlikely to happen, but it will occur once in a while in a
long sequence of trials.
1 of 43 10/24/2024, 8:03
,Exam 2 Stats1200.pdf file:///C:/Users/HP/Desktop/New%20folder%20(4)/Exam%202%20S
3. This event is impossible. It will never happen.
4. This event will occur a little less than half the time over a long sequence of
trials.
A. 0.42
B. 0.01
C. 0.96
D. 0
Answe
rC B
D
A
3. (a) If the knowledge that an event A has occurred implies that a second
event B cannot occur, then the events A and B are said to be
A. Collectively Exhaustive
B. Mutually Exclusive
C. The sample space
2 of 43 10/24/2024, 8:03
,Exam 2 Stats1200.pdf file:///C:/Users/HP/Desktop/New%20folder%20(4)/Exam%202%20S
D. Independent
(b) If event A and event B are as above and event A has probability 0.5 and
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,Exam 2 Stats1200.pdf file:///C:/Users/HP/Desktop/New%20folder%20(4)/Exam%202%20S
event B has probability 0.4, then the probability that A or B occurs is
Answer B
0.5 + 0.4
4. Government data assign a single cause for each death that occurs in the
United States. (Thus, in government terminology, causes of death are mutually
exclusive.) In a certain city, the data show that the probability is 0.35 that a
randomly chosen death was due to cardiovascular (mainly heart) disease, and
0.15 that it was due to cancer.
(a) The probability that a death was due either to cardiovascular disease or to
cancer is
(b) The probability that the death was not due to either of these two causes is
Answer 0.35+0.15
0.5
5. Blood Type O A B AB
Probability 0.12, 0.35, 0.12, ?
(a) Maria has type B blood. She can safely receive blood transfusions from
4 of 43 10/24/2024, 8:03
