PSY 317 Exam 3 Practice

Front

What statistical test should be used to compare children of high, medium, and low family incomes on their satisfaction with the school lunch program?

Back

ANOVA

Front

Which of the following is not an effect examined using a two-way ANOVA?

Back

Error

Front

When is it appropriate to calculate the pooled variance in conducting an independent samples t-test?

Back

When equal variances are assumed.

Front

In a one-sample t-test, what do you compare?

Back

The sample mean and a known population mean.

Front

What is the main purpose of ANOVA?

Back

To determine if there are statistically significant differences between the means of three or more independent groups.

Front

What does a main effect in ANOVA refer to?

Back

The direct effect of an independent variable on the dependent variable.

Front

What is an interaction effect in a two-way ANOVA?

Back

When the effect of one independent variable on the dependent variable changes depending on the level of another independent variable.

Front

What is the null hypothesis in a t-test?

Back

There is no significant difference between the means of the two groups being compared.

Front

What is the significance level (alpha) commonly used in hypothesis testing?

Back

0.05 or 5%.

Front

What does a p-value indicate in hypothesis testing?

Back

The probability of obtaining the observed results, or more extreme results, if the null hypothesis is true.