Business Statistics - Sampling and
Sampling Distributions Quiz Exam prep
The expected value of x̄ equals the mean of the population from which the sample is drawn _____.
a) for any sample size
b) only if the sample size is 100 or greater
c) only if the sample size is 50 or greater
d) only if the sample size is 30 or greater - correct answersa) for any sample size
The basis for using a normal probability distribution to approximate the sampling distribution of x̄ and p̄
is _____.
a) the central limit theorem
b) Bayes' theorem
c) the empirical rule
d) Chebyshev's theorem - correct answersa) the central limit theorem
The standard deviation of x̄ is referred to as the _____.
a) standard x
b) sample standard mean
c) sample mean deviation
d) standard error of the mean - correct answersd) standard error of the mean
The value of the ___________ is used to estimate the value of the population parameter.
a) population statistic
b) sample statistic
c) sample parameter
d) population estimate - correct answersb) sample statistic
A probability sampling method in which we randomly select one of the first k elements and then select
every kth element thereafter is _____.
a) systematic sampling
b) convenience sampling
c) stratified random sampling
d) cluster sampling - correct answersa) systematic sampling
Excel's RAND function _____.
a) selects a simple random sample
b) determines sample size
c) generates random numbers
d) randomizes a population - correct answersc) generates random numbers
A sample statistic, such as x̄, that estimates the value of the corresponding population parameter is
known as a _____.
a) population parameter
b) parameter
c) point estimator
Sampling Distributions Quiz Exam prep
The expected value of x̄ equals the mean of the population from which the sample is drawn _____.
a) for any sample size
b) only if the sample size is 100 or greater
c) only if the sample size is 50 or greater
d) only if the sample size is 30 or greater - correct answersa) for any sample size
The basis for using a normal probability distribution to approximate the sampling distribution of x̄ and p̄
is _____.
a) the central limit theorem
b) Bayes' theorem
c) the empirical rule
d) Chebyshev's theorem - correct answersa) the central limit theorem
The standard deviation of x̄ is referred to as the _____.
a) standard x
b) sample standard mean
c) sample mean deviation
d) standard error of the mean - correct answersd) standard error of the mean
The value of the ___________ is used to estimate the value of the population parameter.
a) population statistic
b) sample statistic
c) sample parameter
d) population estimate - correct answersb) sample statistic
A probability sampling method in which we randomly select one of the first k elements and then select
every kth element thereafter is _____.
a) systematic sampling
b) convenience sampling
c) stratified random sampling
d) cluster sampling - correct answersa) systematic sampling
Excel's RAND function _____.
a) selects a simple random sample
b) determines sample size
c) generates random numbers
d) randomizes a population - correct answersc) generates random numbers
A sample statistic, such as x̄, that estimates the value of the corresponding population parameter is
known as a _____.
a) population parameter
b) parameter
c) point estimator
