A random number generator is used to select a number from 1 to 100. What is the probability of selecting an odd number?
A random number generator is used to select a number from 1 to 100. What is the probability of selecting an odd number?
0.077
0.500
0.050
0.250
Question 2(CO 2) What is the sample space of flipping three coins, where H=heads, and T=tails?
(H,H,H)(H,H,H)(H,H,H)(H,H,H)(T,T,T)(T,T,T)(T,T,T)(T,T,T)
(H,H,H)(H,H,T)(H,T,T)(T,H,H)(T,T,H)(T,T,T)(T,H,T)(H,T,H)
(H,H,T)(H,T,T)(T,H,H)(T,T,H)(T,T,T)(T,H,T)(H,T,H)
(H,H,H)(T,T,T)
Question 3(CO 2) Consider the table below
Response (number of cats owned) Frequency
None 659
One 329
Two 52
Three 13
Four or more 8
What is the probability that the next person asked has only one cat?
50%
31%
5%
62%
Question 4(CO 2) Consider the table below
Age Group Frequency
18-29 9831
30-39 7845
40-49 6869
50-59 6323
60-69 5410
70 and over 5279
What is the probability that the next person chosen will be in the 18-29 or 30-39 age groups?
42.5%
37.8%
23.7%
18.9%
Question 5(CO 2) Based on the CEO’s perception, a company estimates that a new product will be purchased by 32% of current customers. This is an example of which type of probability?
Empirical probability
Subjective probability
Public probability
Classical probability
Question 6(CO 2) Consider the table below.
Age Group Frequency
18-29 9831
30-39 7845
40-49 6869
50-59 6323
60-69 5410
70 and over 5279
What is the complement of P(30-49), or P(30-49’)?
76.3%
64.6%
18.9%
35.4%
Question 7(CO 2) You are selling your product at a three-day event. Each day, there is a 60% chance that you will make money. What is the probability that you will make money on the first two days and lose money on the third day?
0.216
0.144
0.288
0.096
Multiplication rule
Question 8(CO 2) Consider the table below.
Profit Loss Total
Urban location 50 38 88
Rural location 61 84 125
Total 111 132 243
Find the probability that a randomly selected location is going to be profitable, given that it is in an urban location.
56.8%
36.2%
51.4%
48.8%
Conditional probability
Question 9(CO 2) Consider the table below.
Production location Correct Defective Total
East 258 31 289
West 572 106 678
North 755 94 849
South 491 74 565
Total 2076 305 2381
Find the probability that a randomly selected product is defective, given that it is from the South production facility.
12.8%
13.1%
10.7%
23.7%
Conditional probability
Question 10(CO 2) Classify these events. Selecting a king from a deck of cards, replacing it and selecting another king from the same deck. These events would be considered:
Independent
Subjective
Empirical
Dependent
Question 11(CO 2) Classify these events. Some businesses paint the outside of their buildings red while some businesses offer employees health benefits. These events would be considered:
Dependent
Subjective
Classical
Independent
Question 12(CO 2) In a survey of 331 customers, 66 say that service is poor. You select two customers without replacement to get more information on their satisfaction. What is the probability that both say service is poor?
3.88%
19.70%
3.93%
4.00%
Multiplication rule
Question 13(CO 2) Randomly select a customer that purchases tofu. Randomly select a customer that purchases chicken. Are these events mutually exclusive?
Mutually exclusive events
Non-mutually exclusive events
Question 14(CO 2) Two cards are selected without replacement from a standard deck of 52 cards. Find the probability of selecting a jack and then selecting a queen.
0.0060
0.0044
0.0769
0.0059
Question 15(CO 2) Two cards are selected with replacement from a standard deck of 52 cards. Find the probability of selecting a heart and then selecting a diamond.
0.0250
0.0625
0.0637
0.0588
Question 16(CO 2) The probability of a golden retriever catching a tennis ball in mid-air is 81%. Find the probability that a golden retriever catches three tennis balls in mid-air.
0.4052
0.5119
0.6561
0.5314
Question 17(CO 2) A statistics class has 50 students and among those students, 42 are business majors and 8 like grilled cheese. Of the business majors, 7 like grilled cheese. Find the probability that a randomly selected statistics student is a business major or likes grilled cheese.
0.84
0.98
0.86
0.94
Question 18(CO 2) An event is successful 1 out of every 5 attempts. What is the probability of the complement of that event?
Correct!
0.80
0.20
0.15
cannot be determined
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