WEEK 6

Question 1

“In correlation, by placing the predictor on a Y axis, and the criterion on an X axis, what will result?”

Answer 1

the relationship stays the same

Question 2

T/F the correlation will differ depending on what you call the predictor and what you call the criterion variable

Answer 2

TRUE

Question 3

You calculate a correlation and you obtain a value of r = -.1. What does this tell you?

Answer 3

there is a weak negative association between the variables

Question 4

Which of the following statements about the correlation is not true?

1. in calculating the correlation you can convert your data to z-scores so that both variables can be expressed in the same unit of measurement
2. scores in the top left quadrant of a scatterplot will produce a negative value for (zx)(zy)
3. Correct the multiplication of the standard scores will tell you about the form of the association
4. the relative numbers of the positive and negative values and their magnitude will determine the strength of the association

Answer 4

3

Question 5

A positive r reflects the tendency for pairs of observations to occupy

Answer 5

similar relative locations in their respective distributions.

Question 6

“Given that the relationship between GPA and IQ is stronger in high school than in university, the dot cluster for high school (compared to that for college) should”

Answer 6

Correct more closely approximate a straight line.