Correlation and regression

Question 1

What does correlation find?

Answer 1

the line of best fit

Question 2

What does correlation coefficient show?

Answer 2

how much the variables change in the same direction and how much they change together.

Question 3

What does the R-value tell you?

Answer 3

1. which direction your correlation is in
   - Above 0 is positive
   - Below 0 is negative
2. How strong your correlation is
   - If it is close to one is strong
   - If it is close to 0 it is weak

Question 4

What does R-squared value tell you?

Answer 4

how much variance is explained by your correlation. Can be called correlation coefficient.

Question 5

What does regression show?

Answer 5

strength, direction & equations of relationships.

Question 6

Which predictors can correlation and regression deal with?

Answer 6

categorical, ordinal, & non-linear