MATH 1280 Review: Questions With Correct Solutions
In a left-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode Correct Answer - The mode
In a right-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode Correct Answer - The mean
What kind of data is the amount of money spend in a grocery store?
a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete Correct 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 Correct 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 Correct 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
b. 11
c. 18
d. 7.5 Correct 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 Correct 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 Correct 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
b. 30/48
In a left-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode Correct Answer - The mode
In a right-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode Correct Answer - The mean
What kind of data is the amount of money spend in a grocery store?
a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete Correct 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 Correct 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 Correct 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
b. 11
c. 18
d. 7.5 Correct 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 Correct 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 Correct 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
b. 30/48
