PSY-3301 Chapter 6 T/F Quiz

Question 1 10 out of 10 points

The easiest way to determine if a relationship is linear is to calculate the regression line.

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? Question 2 10 out of 10 points

In an inverse relationship as one variable gets larger the other variable gets smaller.

 

? Question 3 0 out of 10 points

The correlation coefficient when N = 2 is meaningless.

 

? Question 4 10 out of 10 points

In a positive relationship as X increases, Y increases.

 

? Question 5 0 out of 10 points

Spearman rho really derives from Pearson r.

 

? Question 6 0 out of 10 points

If one calculates r for a set of numbers and then adds a constant to each value of one of the variables, the correlation will change.

 

? Question 7 0 out of 10 points

As the value of r increases, the proportion of variability of Y that is accounted for by X decreases.

? Question 8

10 out of 10 points

If scores are z scores and if r equals 1 then zX will always equal zY.

 

? Question 9 10 out of 10 points

The use of z scores allows comparisons between variables measured on different scales and units.

? Question 10 10 out of 10 points

A correlation coefficient expresses the direction but not the magnitude of a relationship.

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