Exam 17: Overview and Extension: Statistical Tests for More Complex Designs

Dr.Smith is studying the relationship between the use of a Ipod (portable headphones)and the ability to perceive sounds that have high pitches.She has 2 groups of subjects: one group that does not listen to earphones (N=20)and a group that does listen to earphones (frequently)(N=20).After collecting her data,she has asked you to analyze her results.What statistical test will you use?

When both of the variables under study are qualitative and between-subjects in nature,the appropriate method of data analysis is the

Multiple regression involves two or more

In the study above the independent variable is_____.

The appropriate means of analysis for research designs involving one between-subjects qualitative independent variable and one within-subjects qualitative independent variable would be a:

Dr.Belair is studying the effects of noise exposure on the occurrence of headaches.He exposes 20 subjects to a constant noise in their work environment and asks them to record their headaches.The next week he uses the same subjects without exposing them to noise and measures the number of headaches the subject's record.What statistical test should Dr.Belair use to analyze his data?

What statistical test would you use if your dependent variable is measured on an nominal scale and your independent variable is measured on a nominal scale and you are using a within subject design?

Analysis of variance is rarely used in the behavioral sciences.

A statistical test led Dr.Jones to incorrectly decide that his independent variable had no affect on the dependent variable,when in fact it did.Dr.Jones committed a(n)

Given two between-subjects variables that are multi-valued and measured on a level that at least approximates interval characteristics,the most common method of analysis is:

The strength of the relationship is usually indexed by the 95% confidence interval.

In a one-way analysis of variance (repeated measures)the strength of the relationship is determined by: _____.

If one wishes to compare groups ranks,then a _____ method should be used.

The appropriate statistical methods for Case III situations are techniques called logistic regression and polychotomous logistic regression.

A Two-way ANOVA is used when there are two independent variables.

If ranks are the chosen focus of study,then _____ methods should be used.

Dr.Sho is measuring the dose related effects of amphetamine on maze running in rats.He gives each rat a dose of 0,10,30 mg of amphetamine at different times and measures how fast the rat completes the maze after each dose.He counterbalances the doses to control for order effects.What statistical test should be used to analyze his data?

With only two or three values on the dependent variable,there will be a large number of ties in ranks,and numerous ties can create serious problems for ranked-based approaches.

Dr.Jones found that there is a relationship between day time drowsiness and what time you wake up in the morning r(50)= .60,p<0.01.He calculates the strength of the relationship as ____________________.

If means (or linear relationships)are the focus,then a nonparametric test is the analysis of choice.