MATH 1280 Actual Exam Questions With Reviewed 100%
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1. In a left-skewed distribution, which is greater? The mode
a. The mean
b. The median
c. The mode
2. In a right-skewed distribution, which is greater? The mean
a. The mean
b. The median
c. The mode
3. What kind of data is the amount of money spend in a Quantitative-discrete
grocery store?
a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete
4. The manager of a department store decides to mea- Cluster
sure employee satisfaction by selecting four depart-
ments 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
5. An experiment consists of tossing two, 12-sided dice 4/16
(the numbers 1-12 are printed on the sides of each die).
Let Event A = both dice show an even number. Let Event
, MATH 1280 Actual Exam Questions With Reviewed 100%
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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
6. On any given day, approximately 37.5 percent of the 8.25
cars parked in the De Anza parking garage are parked
crookedly. We randomly survey 22 cars. We are inter-
ested 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
b. 11
c. 18
d. 7.5
7. The probability that a car will have a flat tire while 0.2442
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
8. 0.2963
, MATH 1280 Actual Exam Questions With Reviewed 100%
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In one town, the number of burglaries in a week has a
Poisson distribution with a mean of 1.9. Find the prob-
ability 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
9. One hundred eighteen students were asked what type 30/52
of color their bedrooms were painted: light colors,
dark colors, or vibrant colors. The results were tabu-
lated 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
b. 30/48
c. 22/118
d. 30/52
10. A community college offers classes six days a week: 5.8
Monday through Saturday. Maria conducted a study
of the students in her classes to determine how many
Correct Detailed Answers & Rationales Guaranteed Pass!!
1. In a left-skewed distribution, which is greater? The mode
a. The mean
b. The median
c. The mode
2. In a right-skewed distribution, which is greater? The mean
a. The mean
b. The median
c. The mode
3. What kind of data is the amount of money spend in a Quantitative-discrete
grocery store?
a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete
4. The manager of a department store decides to mea- Cluster
sure employee satisfaction by selecting four depart-
ments 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
5. An experiment consists of tossing two, 12-sided dice 4/16
(the numbers 1-12 are printed on the sides of each die).
Let Event A = both dice show an even number. Let Event
, MATH 1280 Actual Exam Questions With Reviewed 100%
Correct Detailed Answers & Rationales Guaranteed Pass!!
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
6. On any given day, approximately 37.5 percent of the 8.25
cars parked in the De Anza parking garage are parked
crookedly. We randomly survey 22 cars. We are inter-
ested 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
b. 11
c. 18
d. 7.5
7. The probability that a car will have a flat tire while 0.2442
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
8. 0.2963
, MATH 1280 Actual Exam Questions With Reviewed 100%
Correct Detailed Answers & Rationales Guaranteed Pass!!
In one town, the number of burglaries in a week has a
Poisson distribution with a mean of 1.9. Find the prob-
ability 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
9. One hundred eighteen students were asked what type 30/52
of color their bedrooms were painted: light colors,
dark colors, or vibrant colors. The results were tabu-
lated 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
b. 30/48
c. 22/118
d. 30/52
10. A community college offers classes six days a week: 5.8
Monday through Saturday. Maria conducted a study
of the students in her classes to determine how many
