Exam 14: Analyzing Quantitative Data

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

Descriptive statistics estimate the degree of confidence that can be placed in generalizations for a sample and for the population from which the sample was selected.

Which of the following statements about the mean is false?

Skewness is an appropriate measure when describing a nominal variable.

Which of the following is NOT a required task when using secondary data?

The interquartile range measures the difference between the first and fourth quartiles in a distribution.

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

In one model, the researcher wants to examine the effect that education has on drug use. To determine if the independent variable (education) has any effect on the dependent variable (drug use), the researcher should calculate ______.

A researcher finds that as age increases, the number of crimes committed decreases. The relationship between the two variables would be classified as positive.

Seven drug treatment programs are surveyed. The current number of clients in each detention center is 17, 13, 9, 25, 15, 2, and 95. What is the median number of inmates?

What ethical principles should researchers keep in mind when analyzing the relationship between variables?

In a monotonic relationship, the value of cases consistently increases on one variable as the value of cases increases on the other variable.

What percentage of persons with low education do NOT use drugs?

The median is an inappropriate statistic for variables measured at the nominal level.

Which of the following graphs is most appropriate for displaying quantitative variables that vary along a continuum?

Using this set of numbers, 2, 2, 4, 6, 9, 11, 14, 18, 21, 33, what is the mode?

An advocate of tough-on-crime measures is interested in showing the rise in crime rates. He wants to present a graph in which the rise in crime is exaggerated. To do so, he should do which of the following?

Measures of dispersion include the range, variance, and the standard deviation.

The following questions refer to the two tables below describing the hypothetical distribution of daily criminal activity in two cities. Distribution #1Distribution #2# of crimesPercent# of crimesPercent0-881-2.589-11122-3.51212403-4.54013-15284-5.52816105-6.51017 or more26-7.52 -What guideline for combining values in a frequency distribution was violated in Distribution #2?

When type of cases have the most influence on a variable's mean?