PSY 227 Exam 1

What type of distribution is this?

created by measuring the relative frequency of every event in the population. This is possible if sample is very small

What do you have to do to perform a one-sample experiment?

The criterion variable is also called what?

Region of rejection

What type of relationship does this scatterplot show?

Alternative: describes the population parameters the sample data represents if the predicted relationship does NOT exist

When choosing between 1 and 2 tailed tests, when in doubt of direction change, which should you use?

What are the assumptions of linear regression?

The criterion is denoted by what symbol?

In an empirical distribution, what percentage consists of 1 standard deviation?

Heteroscedacity: occurs when the Y scores are spread out to the same degree at every X

Total area under the curve can be between -1.0 and +1.0

The two assumptions of parametric statistics

Procedures that require certain assumptions about the characteristics of the populations being represented are?

Probability of Individual Scores is?

Occurs when random chance produces a sample statistic that is not equal to the population parameter it represents

statistical procedure that uses relationships to predict unknown Y scores based on X scores from a correlated variable

The predictor variable is also known as?

What is the critical value?

When do we use a one-tailed test