Exam 18: Overview and Extension: Statistical Tests for More Complex Designs

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A psychologist's is studying the affects of Ritalin on concentration in 40 children that have been matched on age and IQ.Twenty of the children receive Ritalin and are asked to take an exam that measures their concentration.The other 20 children did not receive Ritalin,but a placebo pill and took the same exam.After graphing this data,the researcher realizes that the data is not normally distributed.What should he do?

(Multiple Choice)
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When one or both variables are measured on an ordinal level that seriously departs from interval level characteristics,Pearson correlation is the test of choice.

(True/False)
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When the independent variable is qualitative and the dependent variable is quantitative,the choice of the appropriate method of data analysis depends on

(Multiple Choice)
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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.This relationship has a ____________________ correlation.

(Short Answer)
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The observed distribution may bias one's decision about a parameter to focus on.

(True/False)
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If one wishes to compare groups ranks,then a _____ method should be used.

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Analysis of variance is rarely used in the behavioral sciences.

(True/False)
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If the dependent variable is measured on an ordinal level that seriously departs from interval level characteristics,a parametric test is always the optimal test.

(True/False)
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Multivariate statistics involve analyzing the relationship between

(Multiple Choice)
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In situations where the dependent measure has only two or three values,most researchers will not use a _____ test.

(Multiple Choice)
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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:

(Multiple Choice)
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If ranks are the focus,then parametric methods should be pursued.

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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?

(Multiple Choice)
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A dependent variable can still be normally distributed,even if it has only two or three values and,hence,the assumption of nonparametric tests will be violated.

(True/False)
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Given the information above,assume that the sample population was not normally distributed what statistical test would be appropriate?

(Multiple Choice)
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The Hotelling T2 test is used when a multivariate analysis of variance is applied to

(Multiple Choice)
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When both variables under study are qualitative and between-subjects in nature,the appropriate method of data analysis is the chi square test as discussed in Chapter 15.

(True/False)
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Dr.Hinson used a One-Way ANOVA,repeated measures and has set his alpha level at .05 nondirectional.He reported the following: F(2,19)=6.99.Based on this information what can you conclude?

(Multiple Choice)
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Given two between-subject variables that are measured on a level that at least approximates interval characteristics,the most common method of analysis is the chi square test.

(True/False)
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If a dependent variable turns out to be highly skewed,then it might be decided to focus on a _____ rather than a _____ to analyze the relationship between two variables.

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