TFL731_Week 3 (A&F chapter 2)

Which of the following is a characteristic that can vary in value among subjects in a sample or population?

• Variable

• Constant

• Sample

• Population

What kind of variable has a measurement scale with numerical values?

• Quantitative

• Qualitative

• Statistic

• Parameter

A variable with possible values from a set of separate numbers, such as 0, 1, 2, 3, etc., is called:

• Discrete

• Continuous

• Qualitative

• Categorical

What kind of variable can take an infinite continuum of possible real number values?

• Continuous

• Any variable

• Discrete

• Categorical

Fill in the blank in this definition:

A ________ sample of n subjects from a population is one in which each possible sample of that size has the same probability (chance) of being selected.

• Simple random

• Convenience

• Snowball

• Quota

What kind of numbers are computer-generated according to a scheme whereby each digit is equally likely to be any of the integers 1, 2, 3, …, 9 and doesn’t depend on the other digits generated?

• Random numbers

• Simple numbers

• Complex numbers

• Real numbers

What do we call an error that occurs when we use a statistic based on a sample to predict the value of a population parameter?

• Sampling error of a statistic

• Error

• Sampling bias

• Convenience sample

Which of the following occurs from using nonprobability samples or having undercoverage?

• Sampling bias

• Response bias

• Nonresponse bias

• Systematic random sample

Which of the following occurs when the subject gives an incorrect response (perhaps lying), or the question wording or the way the interviewer asks the questions is confusing or misleading?

• Response bias

• Sampling bias

• Nonresponse bias

• Systematic random sample

Which of the following occurs when some sampled objects cannot be reached or refuse to participate or fail to answer some questions?

• Response bias

• Sampling bias

• Nonresponse bias

• Simple random sample