NU 400 Chapter 13

What is the median for the following set of scores?

18, 6, 12, 10, 14

• 10

• 14

• 18

• 12

The standard deviation is:

• The square root of the variance

• A measure of variability

• An approximate indicator of how numbers vary from the mean

• All the above

If a distribution is skewed to the left, then it is:

• Negatively skewed

• Positively skewed

• Symmetrically skewed

• Symmetrical

Which of the following represents the 50th percentile, or midpoint, of a distribution?

• Mean

• Median

• Mode

• Variance

The purpose of _________ is to summarize and explain a specific set of data.

• Descriptive statistics

• Inferential statistics

• Parametric procedures

• Nonparametric procedures

The _______ is the value you calculate when you want the arithmetic average.

• Mean

• Median

• Mode

• All the above

When the correlation coefficient is close to one:

• There is no relationship between 2 variables

• There is a weak relationship between 2 variables

• There is a strong relationship between 2 variables

• There is a perfect relationship between 2 variables

A statistical test used to compare 2 or more groups is called:

• A simple regression

• A post hoc test

• A t-test for regression

• A one-way ANOVA

If the relative positions of the mean, median, and mode remain constant, the distribution is:

• Symmetrical

• Skewed

• Relative

• Descriptive

Which test is used when a researcher is interested in the number of responses?

• ANOVA

• t-test

• One-sample test

• Independent samples test