Exam 14: Analyzing Quantitative Data

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The following questions refer to the table below describing the association between education level and drug use: Education Level Drug UseLowHighTotalYes210190400No290310600Total5005001,000 -290 is an example of ______.

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Which of the following is useful to display the frequency distribution of a variable when you have too many values to easily comprehend or display?

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Using this set of numbers, 2, 2, 4, 6, 9, 11, 14, 18, 21, 33, calculate the mean.

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What is the variance for the following array of children's ages:1, 1, 2, 2, 4?

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A variable's rank order is: 4, 5, 6, 7, 8, 9, 9, 10. What is the median position?

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A variable's rank order is: 1, 2, 4, 5, 6, 6, 9. What is the median position?

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If the value of gamma is +1, then the variables are perfectly associated with each other.

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List the five steps to create a grouped frequency distribution.

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The Base N in a frequency distribution refers to the total number of cases.

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Specification is when the original relationship is stronger under some condition(s) of a third variable and weaker under others.

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A ______ is a preferred graphic for qualitative measures and a ______ is a preferred graphic for quantitative measures.

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Which of the following graphs is most appropriate for displaying the distribution of variables measured at the nominal level and other discrete categorical variables?

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A correlation coefficient is zero. This means which of the following?

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Using this set of numbers, 2, 2, 4, 6, 9, 11, 14, 18, 21, 33, in the distribution, the value of 33 is ______.

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A researcher reviews a distribution of a variable and notes that in the distribution the cases cluster to the right and the left tail of the distribution is longer than the right tail. This distribution is negatively skewed.

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Using this set of numbers, 2, 2, 4, 6, 9, 11, 14, 18, 21, 33, calculate the range.

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How many persons with high education use drugs?

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Consider the negative relationship between employment and crime. Name one other variable that might intervene in this relationship.

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What percentage of persons are drug users?

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Standard deviation is the preferred measure of variation.

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