Exam 14: Analyzing Results

Which Test Do I Use? An epidemiologist investigating sexually transmitted disease classifies subjects into five condom usage categories: 100%, 75-99%, 50-74%, 25-49%, and 0-24%.Which level of measurement is she using?

A One-Way Analysis of Variance A one-way analysis of variance summary table shows 3 degrees of freedom between groups and 16 degrees of freedom within groups.How many subjects participated in this study?

The t Test We calculate r for a t test for independent groups based on the

A One-Way Analysis of Variance If Renee has 60 subjects and 2 degrees of freedom between groups in a one-way analysis of variance, her independent variable must have ___ levels.

Sources of Variability Within-groups variability is produced by

One-Way Repeated Measures Analysis of Variance Puck presented subjects with three different sets of student pictures and asked them to recall as many names as possible from each set.One set contained pictures of cheerleaders.A second featured pictures of glee club members.The final set consisted of pictures of ultimate Frisbee players.Which statistical test should Puck use to analyze his data?

The t Test If we calculate a t test for matched groups with 20 subjects, there will be ___ degrees of freedom.

Which Test Do I Use? You should decide which test of significance to use

The t Test Cohen classifies an effect size as large when r is at least

The t Test Susan's two-group experiment ran 10 subjects in the control condition and 12 subjects in the experimental condition.Calculate the degrees of freedom for a t test for independent groups using these data.

The Chi Square Test The degrees of freedom represent

The t Test With fewer degrees of freedom,

Analyzing Data from a Between-Subjects Factorial Experiment The principal advantage of a two-way analysis of variance over a one-way analysis of variance is that a two-way analysis of variance

Sources of Variability Which of these statements is the null hypothesis for an F test?

Two-Way Analysis of Variance In an ANOVA for a 2 X 2 factorial experiment with 8 subjects in each group, there would be ___ df in the numerator and ___ df in the denominator for the F test for the first factor.

Statistics for Two Group Experiments Logan randomly assigned subjects to study for a Physiological Psychology exam using one of two study aids (flash cards with text or flash cards with text and diagrams).He should analyze both groups' exam scores, which range from 0-150, using a

Statistics for Two Group Experiments Which statistical test should you use to evaluate nominal data from a two- group experiment?

The Chi Square Test A chi square test

Statistics for Two Group Experiments Samantha's experiment obtained reaction time data using a factorial design with two independent variables.She should use a ____ to evaluate her data.

Interpreting the Results Since Bama predicted group differences, he performed three a priori tests to analyze a three-group experiment.What was wrong with this decision?