Exam 13: Pearson Correlation and Regression: Inferential Aspects

The linear model states that a person's score on Y is a linear function of X,with â representing the intercept and á representing the slope.

The use of the slope as an index of effect size only makes sense when the correlation between Y and X is:

When a relationship is found using the Pearson correlation technique on sample data,this does not mean there is a non-zero correlation in the population,because of _____.

The test of the null hypothesis that ñ = 0 is based on the assumption that:

If the test of a Pearson correlation yields statistically significant results,researchers will sometimes pursue analysis of the:

Imagine you are interested in researching the relationship between job experience and income among early-career working professionals.You take a random sample of 32 professionals from the nearest city,and you ask them to report their annual income and submit a resumé outlining their professional experience.You later calculate their years of experience from their resumés.You compute the following information: Assume,for the above example,that you calculated the estimated standard error of the estimate to be,11.20.How should this standard error of the estimate be interpreted?

How is the strength of the relationship between two variables evaluated in a correlational analysis?

In the regression equation of a population,the symbol ?

In Pearson correlation,the alternative hypothesis states that r ___ 0.

What is the estimated standard error of estimate?

In regression,the variable from which predictions are made is formally known as the ____________________.

The estimated standard error of the estimate is an index of how much error will occur in the population when:

The population value of the standard error of stimate can be estimated from ample data by substituting the degrees of freedom of ____________________ in the denominator.

The measure of the strength of the relationship found using the Pearson correlation is _______.

A social psychologist is interested in whether education level is related the number of desired children.She obtains an r value of -.24 with 62 subjects.What can we conclude from this study? Base your answer on whether the correlation is significant or not,using an alpha level of .05,nondirectional test.

Under certain conditions,the t test for the Pearson correlation is robust with respect to violations of normality and homogeneity of variance.

In the equation for the linear model,å is called an error score that reflects all factors that are uncorrelated with X that influence Y.

A statistically significant direct relationship between self-esteem and optimism would indicate that

What are the assumptions of Pearson correlation?

The nature of the relationship between two correlated variables is determined by