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?
,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
Sara, a statistics student, wanted to determine the mean number of books that college
professors have in their office. She randomly selected two buildings on campus and asked each
professor in the selected buildings how many books are in his or her office. Sara surveyed 25
professors. The type of sampling selected is:
a. simple random sampling.
b. systematic sampling.
c. cluster sampling.
d. stratified sampling. - Answer: cluster sampling.
Which of the following is NOT true about the distribution for averages?
a. The mean, median, and mode are equal.
b. The area under the curve is 1.
c. The curve never touches the x-axis.
, d. The curve is skewed to the right. - Answer: The curve is skewed to the right.
A health club is interested in knowing how many times a typical member uses the club in a
week. They decide to ask every tenth customer on a specified day to complete a short survey,
including information about how many times they have visited the club in the past week. What
kind of a sampling design is this?
a. Cluster
b. Stratified
c. Simple random
d. Systematic - Answer: Systematic
A health club is interested in knowing how many times a typical member uses the club in a
week. They decide to ask every tenth customer on a specified day to complete a short survey,
including information about how many times they have visited the club in the past week. What
kind of data is number of visits per week?
a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete - Answer: Quantitative-discrete
The lifetime of a computer circuit board is normally distributed with a mean of 2,500 hours and
a standard deviation of 60 hours. What is the probability that a randomly chosen board will last
at most 2,560 hours?
a. 0.8413
b. 0.1587
c. 0.3461
d. 0.6539 - Answer: 0.8413
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?
,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
Sara, a statistics student, wanted to determine the mean number of books that college
professors have in their office. She randomly selected two buildings on campus and asked each
professor in the selected buildings how many books are in his or her office. Sara surveyed 25
professors. The type of sampling selected is:
a. simple random sampling.
b. systematic sampling.
c. cluster sampling.
d. stratified sampling. - Answer: cluster sampling.
Which of the following is NOT true about the distribution for averages?
a. The mean, median, and mode are equal.
b. The area under the curve is 1.
c. The curve never touches the x-axis.
, d. The curve is skewed to the right. - Answer: The curve is skewed to the right.
A health club is interested in knowing how many times a typical member uses the club in a
week. They decide to ask every tenth customer on a specified day to complete a short survey,
including information about how many times they have visited the club in the past week. What
kind of a sampling design is this?
a. Cluster
b. Stratified
c. Simple random
d. Systematic - Answer: Systematic
A health club is interested in knowing how many times a typical member uses the club in a
week. They decide to ask every tenth customer on a specified day to complete a short survey,
including information about how many times they have visited the club in the past week. What
kind of data is number of visits per week?
a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete - Answer: Quantitative-discrete
The lifetime of a computer circuit board is normally distributed with a mean of 2,500 hours and
a standard deviation of 60 hours. What is the probability that a randomly chosen board will last
at most 2,560 hours?
a. 0.8413
b. 0.1587
c. 0.3461
d. 0.6539 - Answer: 0.8413
