MATH 1280 – Review/ 50 Qs & Correct Ans/
2024-2025.
In a left-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mode
In a right-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mean
What kind of data is the amount of money spend in a grocery store?
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,a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete - Answer: Quantitative-discrete
The manager of a department store decides to measure employee satisfaction by selecting four
departments at random and conducting interviews with all the employees in those four
departments. What type of survey design is this?
a. Cluster
b. Stratified
c. Simple random
d. Systematic - Answer: Cluster
An experiment consists of tossing two, 12-sided dice (the numbers 1-12 are printed on the sides
of each die). Let Event A = both dice show an even number. Let Event B = both dice show a
number greater than eight. Find P(A|B)
a. 2/4
b. 16/144
c. 4/16
d. 2/144 - Answer: 4/16
On any given day, approximately 37.5 percent of the cars parked in the De Anza parking garage
are parked crookedly. We randomly survey 22 cars. We are interested in the number of cars that
are parked crookedly. For every 22 cars, how many would you expect to be parked crookedly, on
average?
a. 8.25
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, b. 11
c. 18
d. 7.5 - Answer: 8.25
The probability that a car will have a flat tire while driving through a certain tunnel is 0.00004.
Use the Poisson distribution to approximate the probability that among 7000 cars passing
through this tunnel, at least one will have a flat tire.
a. 0.2442
b. 0.3126
c. 0.7558
d. 0.7884
e. 0.2116 - Answer: 0.2442
In one town, the number of burglaries in a week has a Poisson distribution with a mean of 1.9.
Find the probability that in a randomly selected week the number of burglaries is at least three.
a. 0.1710
b. 0.1253
c. 0.8290
d. 0.7037
e. 0.2963 - Answer: 0.2963
One hundred eighteen students were asked what type of color their bedrooms were painted:
light colors, dark colors, or vibrant colors. The results were tabulated according to gender.
Find the probability that a randomly chosen student is male given the student's bedroom is
painted with dark colors.
a. 30/118
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2024-2025.
In a left-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mode
In a right-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mean
What kind of data is the amount of money spend in a grocery store?
Page 1 of 17
,a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete - Answer: Quantitative-discrete
The manager of a department store decides to measure employee satisfaction by selecting four
departments at random and conducting interviews with all the employees in those four
departments. What type of survey design is this?
a. Cluster
b. Stratified
c. Simple random
d. Systematic - Answer: Cluster
An experiment consists of tossing two, 12-sided dice (the numbers 1-12 are printed on the sides
of each die). Let Event A = both dice show an even number. Let Event B = both dice show a
number greater than eight. Find P(A|B)
a. 2/4
b. 16/144
c. 4/16
d. 2/144 - Answer: 4/16
On any given day, approximately 37.5 percent of the cars parked in the De Anza parking garage
are parked crookedly. We randomly survey 22 cars. We are interested in the number of cars that
are parked crookedly. For every 22 cars, how many would you expect to be parked crookedly, on
average?
a. 8.25
Page 2 of 17
, b. 11
c. 18
d. 7.5 - Answer: 8.25
The probability that a car will have a flat tire while driving through a certain tunnel is 0.00004.
Use the Poisson distribution to approximate the probability that among 7000 cars passing
through this tunnel, at least one will have a flat tire.
a. 0.2442
b. 0.3126
c. 0.7558
d. 0.7884
e. 0.2116 - Answer: 0.2442
In one town, the number of burglaries in a week has a Poisson distribution with a mean of 1.9.
Find the probability that in a randomly selected week the number of burglaries is at least three.
a. 0.1710
b. 0.1253
c. 0.8290
d. 0.7037
e. 0.2963 - Answer: 0.2963
One hundred eighteen students were asked what type of color their bedrooms were painted:
light colors, dark colors, or vibrant colors. The results were tabulated according to gender.
Find the probability that a randomly chosen student is male given the student's bedroom is
painted with dark colors.
a. 30/118
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