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Variables, frequency table & distributions for teen drivers

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1. A researcher wants to determine if teenage drivers of red automobiles are more likely to run a red light than automobiles of any other color. She stands at a busy intersection and records the colors of automobiles which run red lights.

I. What is the population?

II. What is the sample?

III. Is the study observational or experimental? Justify your answer.

IV. What are the independent and dependent variables?

V. For each of those variables, what level of measurement was used to obtain data from these variables?

VI. Classify those variables as either attribute or numerical

2. Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable:
religious affiliation.

3. Classify the following as an example of a nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level:
customer ratings of 10 area grocery stores

4. Construct a frequency distribution table to organize the following set of data:
108 106 109 102 103 101 101 109 108 109
103 107 110 109 105 106 109 109 102 106

5. Construct a grouped frequency distribution for the following 28 scores using a class width of 4:
74 60 53 52 74 52 58 68 74 72 71 74 55 67
68 53 71 52 69 74 67 51 69 61 60 65 72 71

6. Provide a different example for each of the following types of variables from your work or home:
Quantitative - continuous
Qualitative - ordinal

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