Correlation

Question 1

Correlation

Answer 1

Tests for nonrandom association between two Continuous variables

Question 2

Coefficient of determination (R^2)

Answer 2

Proportion of the variable in the dependent variable that is predictable from the independent variable

Question 3

Trendline

Answer 3

Line that best matches the trend in the sample data

Question 4

Permutations

Answer 4

Random mixes of the data

Question 5

A correlation examines association between which general type of variable?

Answer 5

Continuous variable

Question 6

What does a high value for R^2 indicate about the relationship between two variables?

Answer 6

There is a strong correlation between the variables

Question 7

How is the strength of correlation between two variables measured? How is R^2 calculated?

Answer 7

R^2 is calculated based on the distances of the points from the line

Question 8

What does the P- value mean in a correlation test?

Answer 8

The probability that we could have gotten strong R^2 when the null hypothesis is true

Question 9

What is the null hypothesis of any correlation test?

Answer 9

The null proposes that the variables are randomly associated