QBA 283 EXAM 1 QUESTIONS AND ANSWERS
COMPLETE AND RATED A.
The mean of a population is a type of ______, while the mean of a sample is a type
of _______.
a. Statistic, parameter
b. Count, statistic
c. Statistic, count
d. Parameter, statistic
d. parameter, statistic
The standard error of the mean is...
a. Denoted as σx̅
b. The standard deviation of the means of multiple samples
c. Both a and b
d. None of the above
c. both a and b
As the sample size decreases, which of the following takes place?
a. The standard error become larger
b. The sampling error increases
c. The standard error becomes smaller
d. Both a and b
d. both a and b
What should you do if you want less sampling error?
a. Add more people or things to your sample
b. Add more people or things to your population
c. Write higher quality survey questions
d. Both a and c
, d. both a and c
Which of the following techniques allows each member of the population to have
the same chance of being selected?
a. Convenience sampling
b. Systematic sampling
c. Stratified sampling
d. Simple random sampling
d. simple random sampling
If you subtract the sample statistic from the population parameter, you will get
the__________.
a. Standard error
b. Standard deviation
c. Sampling error
d. Nonsampling error
c. sampling error
According to Central Limit theorem, what sample size do you need in order for a
normal distribution to occur?
a. 10
b. 30
c. 100
d. 300
b. 30
Central Limit Theorem states that if the population has a normal distribution...
a. All sample means will have a normal distribution regardless of the sample sizes.
b. Only samples ≥ 30 will have a normal distribution.
c. Only samples < 30 will have a normal distribution.
d. None of the above
COMPLETE AND RATED A.
The mean of a population is a type of ______, while the mean of a sample is a type
of _______.
a. Statistic, parameter
b. Count, statistic
c. Statistic, count
d. Parameter, statistic
d. parameter, statistic
The standard error of the mean is...
a. Denoted as σx̅
b. The standard deviation of the means of multiple samples
c. Both a and b
d. None of the above
c. both a and b
As the sample size decreases, which of the following takes place?
a. The standard error become larger
b. The sampling error increases
c. The standard error becomes smaller
d. Both a and b
d. both a and b
What should you do if you want less sampling error?
a. Add more people or things to your sample
b. Add more people or things to your population
c. Write higher quality survey questions
d. Both a and c
, d. both a and c
Which of the following techniques allows each member of the population to have
the same chance of being selected?
a. Convenience sampling
b. Systematic sampling
c. Stratified sampling
d. Simple random sampling
d. simple random sampling
If you subtract the sample statistic from the population parameter, you will get
the__________.
a. Standard error
b. Standard deviation
c. Sampling error
d. Nonsampling error
c. sampling error
According to Central Limit theorem, what sample size do you need in order for a
normal distribution to occur?
a. 10
b. 30
c. 100
d. 300
b. 30
Central Limit Theorem states that if the population has a normal distribution...
a. All sample means will have a normal distribution regardless of the sample sizes.
b. Only samples ≥ 30 will have a normal distribution.
c. Only samples < 30 will have a normal distribution.
d. None of the above
