MATH 1280 – Review UPDATED ACTUAL Questions and
CORRECT Answers
In a left-skewed distribution, which is greater?
The mode a. The mean
b. The median
c. The mode
In a right-skewed distribution, which is greater?
The mean a. The mean
b. The median
c. The mode
What kind of data is the amount of money spend in a grocery
store?
Quantitative-discrete
a. Qualitative
b. Quantitative-continuous
c. 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?
Cluster
a. Cluster
b. Stratified
c. Simple random
d. Systematic
, 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)
4/16
a. 2/4
b. 16/144
c. 4/16
d. 2/144
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?
8.25
a. 8.25
b. 11
c. 18
d. 7.5
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.
0.2442
a. 0.2442
b. 0.3126
c. 0.7558
d. 0.7884
e. 0.2116
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.
0.2963
a. 0.1710
b. 0.1253
c. 0.8290
d. 0.7037
e. 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
30/52 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
CORRECT Answers
In a left-skewed distribution, which is greater?
The mode a. The mean
b. The median
c. The mode
In a right-skewed distribution, which is greater?
The mean a. The mean
b. The median
c. The mode
What kind of data is the amount of money spend in a grocery
store?
Quantitative-discrete
a. Qualitative
b. Quantitative-continuous
c. 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?
Cluster
a. Cluster
b. Stratified
c. Simple random
d. Systematic
, 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)
4/16
a. 2/4
b. 16/144
c. 4/16
d. 2/144
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?
8.25
a. 8.25
b. 11
c. 18
d. 7.5
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.
0.2442
a. 0.2442
b. 0.3126
c. 0.7558
d. 0.7884
e. 0.2116
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.
0.2963
a. 0.1710
b. 0.1253
c. 0.8290
d. 0.7037
e. 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
30/52 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
