Exam 6: Correlational Methods and Statistics

In the case of a positive relationship,as scores on X _____,scores on Y _____.

A correlation coefficient of 0.00 is to _____ as a correlation coefficient of -1.00 is to _____.

Imagine that you assessed the relationship between the variables of nutrition and general health.Draw the scatterplot depicting what this relationship would look like.

General State University recently decided to discontinue its use of the GRE as an admissions tool for its graduate programs because they observed no correlation between GRE scores and subsequent GPAs.Ninety percent of the grades awarded in the graduate programs at General State University are A's.What General State has failed to consider in this situation is the issue of

Explain when each of the correlation coefficients listed below should be used.

When there is a _____ relationship,as scores on X increase,scores on Y decrease.

A correlation coefficient of +1.00 is to _____ as a correlation coefficient of -1.00 is to _____.

Pam is interested is assessing the degree of relationship between gender and test grades in her psychology class.Pam should use the _____ correlation coefficient to assess this.

A variable that is truncated and has limited variability is said to have

The _____ indicates the magnitude of a correlation coefficient.

Jim thought that the strong negative correlation that he observed between depression and self-esteem meant that having a low self-esteem led to high levels of depression.Jim is misinterpreting the correlation by assuming

If a correlation coefficient that you expected to be fairly high turns out to be very low,you should investigate whether there is a

A correlation coefficient of _____ indicates that the variables form a perfect linear relationship.

If the points on a scatterplot are clustered in a pattern that extends from the lower left to the upper right,this would suggest that the two variables depicted are

Explain how curvilinear relationships can be a problem when interpreting correlation coefficients.

Two interval/ratio variables are to _____ coefficient and one interval/ratio variable and one nominal variable are to _____ coefficient.

When there is a _____ relationship,as scores on X increase,scores on Y also increase.

Per the text,we would expect the correlation between smoking and lung cancer to be _____ whereas we would expect the correlation between mountain elevation and temperature to be _____.

Assume that the regression equation for the relationship between SAT scores and IQ scores is y=9 + .105x.What would you expect the IQ score to be for the following individuals given their SAT scores?

Two variables increasing and decreasing together is to _____ as two variables moving in opposite directions is to _____.