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A Likert scale with an even number of scale points between "Strongly Agree" and "Strongly Disagree"

• is intended to prevent "neutral" choices.

• cannot have equal scale distances.

• must have a verbal label on each scale point.

• 
  is rarely used in surveys.

By taking a systematic sample, in which we select every 50th shopper arriving at a specific store, we are approximating a random sample of shoppers.

• True

• False

Categorical data have values that are described by words rather than numbers.

• True
• False

Automobile exhaust emission of CO2 (milligrams per mile) is ________ data.

• interval

• ratio

• 
  ordinal

• 
  nominal

Internet surveys posted on popular websites suffer from nonresponse bias.

• True

• False

A stratified sample is sometimes recommended when

• the sample size is very large.

• the population is small compared to the sample.

• distinguishable strata can be identified in the populations.

• the population is spread out geographically.

A bivariate data set has only two observations on a variable.

• True
• False

Likert scales are especially important in opinion polls and marketing surveys.

• True
• False

A binary variable (also called a dichotomous variable or dummy variable) has

• ordinal or interval values.

• only two possible values.

• continuous scale values.

• rounded data values.

Running times for 500 runners in a 5k race would be a univariate data set.

• True
• False