Exam 7: Summarizing and Interpreting Data: Using Statistics

Correlation indicates a typical score in the distribution of collected scores.

A(n) ______ hypothesis predicts a directional effect, whereas a(n) ______ hypothesis predicts an effect in either direction.

One way that researchers sometimes estimate the population mean from the sample mean is with a confidence interval.

For correlational studies with a predictor and outcome, the predictor variable is typically plotted on the ______.

A graph showing the relationship between two dependent variables for a group of individuals is called a ______.

A(n) ______ hypothesis predicts no effect, whereas a(n) ______ hypothesis predicts an effect.

The middle score in a distribution, such that half of the scores are above, and half are below that value, is the ______.

In a research study the p value obtained for the inferential statistic is .08. This means that ______.

The difference between the highest and lowest scores in a distribution is the ______.

The critical region is the most extreme portion of a distribution of statistical values for the null hypothesis determined by the alpha level.

The measurement of the length of time to complete a task is called ______.

What does the p value in an inferential test represent?

The alternative hypothesis in this study is ______.

Based on the results reported above and an alpha level of .05, the ______ p value is possible for the test comparing the groups in this study.

The ______ statistics summarize a distribution, while the ______ statistics provide a test of the hypothesis.

Explain why it is necessary to set an alpha level of an inferential test.

The ______ indicates the most common score in a distribution.

The number of scores that can vary in the calculation of a statistic is called the ______.

The ______ is the most basic measure.

If we reject the null hypothesis when it's really true, we have made a ______.