1.A failing student is passed by an examiner. It is an exampleof: a.Type I error
ID: 2951118 • Letter: 1
Question
1.A failing student is passed by an examiner. It is an exampleof:a.Type I error
b.Type II error
c.Correct decision
d.No information regarding student exams
2.The collection of all outcomes for an experiment is called:
a.a sample space
b.joint probability simple event
d.the intersection of events
c.random experiment
3.It has been estimated that about 30% of frozen chicken containenough salmonella bacteria to cause illness if improperly cooked. Aconsumer purchases 12 frozen chickens. What is the probability thatthe consumer will have more than 6 contaminated chickens?
a.0.961
b.0.118
c.0.882
d.0 .039
4.A deserving Student is not selected for the scholarship. It is anexample of:
a.Type I error
b.Type II error
c.Correct decision
d.No information regarding student exams
5.Two mutually exclusive (disjoint) events:
a.have no effect on the occurrence of each othercan be independent
b.cannot occur together
c.have the same probability
d.are always independent
6. Which of the following is NOT applicable to a Poissondistribution?
a.It is used to compute the probability of rareevents
b.Every event is independent of every otherevent
c.It is parameterized by the sample size and theprobability that an Event will occur
d.The theoretical range for the number of eventsthat could occur is 0,1,2,3,………..
7. The distribution of weights in a large group is approximatelynormally distributed. The mean is 80 kg. And approximately 68% ofthe weights are between 70 and 90 kg. The standard deviation of thedistribution of weights is equal to:
a.20
b.5
c.10
d.50
8. If P(A) = 0.45, P(B) = 0.35, and P(A and B) = 0.25, then P(A |B) is:
a.1.4
b.1.8
c.0.714
d.0.556
9. Which one of the following sampling methods would give unbiasedresults, if you need to find out the number of people in your townliking vanilla or chocolate ice creams?
a.Ask my neighbors
b.Randomly select a few ice cream shops in town,and question people coming there
c.Ask my friends
d.Ask my classmates
10. A random sample of 15 people is taken from a population inwhich 40% favor a particular political stand. What is theprobability that exactly 6 individuals in the sample favor thispolitical stand?
a.0.4000
b.0.5000
c.0.4000
d.0.2066
11. Which of the following is a characteristic of a binomialprobability experiment?
a.Each trial has at least two possibleoutcomes
b.P(success) = P(failure)
c.The binomial random variable x is the count ofthe number of trials that occur
d.The result of one trial does not affect theprobability of success on any other trial
12. In the FA examination, 24candidates offered Statistics. If theprobability of passing the subject be 1/3, what will be the mean ofthe distribution?
a.7
b.8
c.6
d.5
13. To test the proportions we use the ………
a.?2- test
b.t-test
c.c.F-test
d.Z-test
14. If a coin is tossed three times, the likelihood of obtainingthree heads in a row is:
a.0.125
b.0.875
c.0.500
d.0.000
Explanation / Answer
1.A failing student is passed by an examiner. It is an exampleof:
b.Type II error
2.The collection of all outcomes for an experiment is called:
a.a sample space
3.It has been estimated that about 30% of frozen chicken containenough salmonella bacteria to cause illness if improperly cooked. Aconsumer purchases 12 frozen chickens. What is the probability thatthe consumer will have more than 6 contaminated chickens?
d.0 .039
4.A deserving Student is not selected for the scholarship. It is anexample of:
a.Type I error
5.Two mutually exclusive (disjoint) events:
d.are always independent
6. Which of the following is NOT applicable to a Poissondistribution?
c.It is parameterized by the sample size and theprobability that an Event will occur
7. The distribution of weights in a large group is approximatelynormally distributed. The mean is 80 kg. And approximately 68% ofthe weights are between 70 and 90 kg. The standard deviation of thedistribution of weights is equal to:
c.10
8. If P(A) = 0.45, P(B) = 0.35, and P(A and B) = 0.25, then P(A |B) is:
c.0.714
9. Which one of the following sampling methods would give unbiasedresults, if you need to find out the number of people in your townliking vanilla or chocolate ice creams?
b.Randomly select a few ice cream shops in town,and question people coming there
10. A random sample of 15 people is taken from a population inwhich 40% favor a particular political stand. What is theprobability that exactly 6 individuals in the sample favor thispolitical stand?
d.0.2066
11. Which of the following is a characteristic of a binomialprobability experiment?
d.The result of one trial does not affect theprobability of success on any other trial
12. In the FA examination, 24candidates offered Statistics. If theprobability of passing the subject be 1/3, what will be the mean ofthe distribution?
b.8
13. To test the proportions we use the ………
d.Z-test
14. If a coin is tossed three times, the likelihood of obtainingthree heads in a row is:
a.0.125
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