Topic 11 A: Correlation

Question 1

To find out the relationship between 2 continous variables, you cant use ——, you need to use ——-

Answer 1

• ANOVA
• Correlation and regression

Question 2

Correlation is a

Answer 2

linear relationship between two continous variables (as one variable goes up, the other goes up or down at a continous rate)

Question 3

Scatter plots (2)

Used to+ can help

Answer 3

• Used to plot correlational data
• Can help to see whether a linear relationship exists between variables

Question 4

Negative correlation

Answer 4

As X increase, Y decrease

Question 5

Positive correlation

Answer 5

As X increases, Y increases

Question 6

More clustered on a line means

Answer 6

stronger correlation

Question 7

Correlation Coefficient

Answer 7

• A measure of the strength and the direction of a linear relationship between 2 variables

Question 8

r

Answer 8

sample correlation coefficient

Question 9

p

Answer 9

population correlation coefficient

Question 10

n

Answer 10

Number of data pairs

Question 11

the range of the correlation coefficient is

Answer 11

-1 to 1

Question 12

correlation r value effect size

Answer 12

Question 13

Hypothesis testing for correlations

Answer 13

• To determine whether two variables are significantly correlated at a specified level of significance

Question 14

Hypothesis testing for correlations H0 and Ha

Answer 14

Question 15

Df

Answer 15

n-2

Question 16

Correlation t-test rejection Ho phrasing for 2 tail:

Answer 16