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# Parametric and Nonparametric Data Identification

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Label each of the following situations "P" if it is an example of parametric data or "NP" if it is an example of nonparametric data.
1. In a comparison of two towns, is the average height of its residents the same? _____
2. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. Did the change to the process improve the MTBF? _____
3. The average life span of a dog is proportional to the amount of calcium consumed. _____
4. The correlation between gene disorders and certain diseases. _____
5. From a written survey where the respondents were asked to rate an individual on a scale of 1 to 5, one group rated an individual a 3.7, another group rated the individual a 4.3. Is the difference statistically significant? _____
6. A study of vehicle accidents on a military installation compared to drivers' rank. _____
7. Show that the numbers drawn in a state lottery are truly random. _____
8. There is a direct correlation to a student's grade and the student's rating of an instructor.

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#### Solution Summary

Label each of the following situations "P" if it is an example of parametric data or "NP" if it is an example of nonparametric data.
1. In a comparison of two towns, is the average height of its residents the same? _____
2. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. Did the change to the process improve the MTBF? _____
3. The average life span of a dog is proportional to the amount of calcium consumed. _____
4. The correlation between gene disorders and certain diseases. _____
5. From a written survey where the respondents were asked to rate an individual on a scale of 1 to 5, one group rated an individual a 3.7, another group rated the individual a 4.3. Is the difference statistically significant? _____
6. A study of vehicle accidents on a military installation compared to drivers' rank. _____
7. Show that the numbers drawn in a state lottery are truly random. _____
8. There is a direct correlation to a student's grade and the student's rating of an instructor.

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