QBA 282 Chapter 7 (Quiz)
According to Central Limit theorem, what sample size do you need in order for a normal distribution to occur? Select one: a. 30 b. 10 c. 300 d. 100
a. 30
A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the _____. Select one: a. central limit theorem b. approximation theorem c. normal distribution theorem d. None of the above.
a. central limit theorem
Which of the following sampling methods does NOT lead to probability samples? Select one: a. convenience sampling b. cluster sampling c. stratified sampling d. none of the above
a. convenience sampling
A numerical characteristic from a population is called a: Select one: a. parameter b. Systematic sample c. statistic d. simple random sample
a. parameter
The difference between the value of the sample statistic and the value of the population parameter is the__________. Select one: a. sampling error b. nonsampling error c. standard deviation d. standard error
a. sampling error
Which of the following techniques allows each member of the population to have the same chance of being selected? Select one: a. Stratified sampling b. Systematic sampling c. Simple random sampling d. Convenience sampling
c. Simple random sampling
The standard error of the mean is: Select one: 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
What is a sample? Select one: a. An entire group of people or things of interest b. A small population c. One person or thing for a population d. A subset of people or things from the population of interest
d. A subset of people of things from the population of interest
When the population has a normal distribution, the sampling distribution of the sample mean is normally distributed _____. Select one: a. for samples of 30 or more b. for samples of 50 or more c. for infinite samples d. for any sample size
d. for any sample size
The mean of a population is a type of ______, while the mean of a sample is a type of _______. Select one: a. count, statistic b. statistic, count c. statistic, parameter d. parameter, statistic
d. parameter, statistic