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Practice Quiz
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1
Which word is not part of the definition of statistics?
A)Organizing
B)Analyzing
C)Presenting
D)Predicting
2
In descriptive statistics our main objective is to
A)Describe the population.
B)Describe the data we collected.
C)Infer something about the population.
D)Compute an average.
3
Which of the following statements is true regarding a population?
A)It must be a large number of values.
B)It must refer to people.
C)It is a collection of individuals or objects.
D)None of the above.
4
Which of the following statements is true regarding a sample?
A)It is part of population.
B)It must contain at least five observations.
C)It refers to descriptive statistics.
D)All of the above are correct.
5
A qualitative variable
A)Always refers to a sample.
B)Is not numeric.
C)Has only two possible outcomes.
D)All of the above are correct.
6
A discrete variable is
A)An example of a qualitative variable.
B)Can assume only whole number values.
C)Can assume only certain clearly separated values.
D)Cannot be negative.
7
A nominal scale variable is
A)Usually the result of counting something.
B)Has a meaningful zero point.
C)May assume negative values.
D)Cannot have more than two categories.
8
The ratio scale of measurement
A)Usually involves ranking.
B)Cannot assume negative values.
C)Has a meaningful zero point.
D)Is usually based on counting.
9
The ordinal scale of measurement
A)Has a meaningful zero point.
B)Is based on ranks.
C)Cannot assume negative values.
D)All of the above.
10
Categories are exhaustive when
A)There is a meaningful zero point.
B)The objects can be ranked.
C)Each object must appear in at least one category.
D)Each object can be included in only one category.
11
A continuous variable
A)Must be a whole number
B)Is always used for inference
C)Can assume any value within a given range
D)Can assume any value up to infinity
12
The amount of time students spend on homework is a
A)continuous variable
B)qualitative variable
C)discrete variable
D)nominal variable





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