Exam 10: Distributions and Associations

The variance measure of a variable is in the same units as the variable values.

In a study, the number of cigarettes smoked by high school students was analyzed in relation to several social factors. The primary factor was found to be peer pressure, which was categorized as low, medium, and, high for the study. What kind of test would you do to find the association between peer pressure and smoking?

A report shows the mean, median, mode of a quantitative variable. It also gives the range, standard deviation, skewness and kurtosis values for the variable. What is this type of report called?

What is the plausible value range of a measure of position such as percentiles? Explain your answer.

What type of distribution would you call the following set of numbers, in terms of measures of central tendency: 23, 25, 25, 41, 25, 50, 47, 50, 21, 50?

How is the range of a continuous variable calculated?

Which of the following could be used to present association between two categorical variables?

The variability in a nominal variable could be shown by a frequency distribution or by the range measure.