Regression and Correlation / Hypothesis testing

Question 1

Linear Regression equation

Answer 1

y = a + bx

Question 2

Exponential regression equation

Answer 2

y=ab^x

Question 3

Logs regression equation

Answer 3

Log(y) = Log(a) + xLog(b)

Question 4

• P > 0
• r is greater than crv

Answer 4

There is evidence to reject H0
i.e. there is a positive correlation between “refer to question”

Question 5

• P > 0
• r is less than crv

Answer 5

There is not enough evidence to reject H0
Suggests no correlation between “refer to question”

Question 6

• P < 0
• r is greater than crv

Answer 6

There is not enough evidence to reject H0
Suggests no correlation between “refer to question”

Question 7

• P < 0
• r is less than crv

Answer 7

There is evidence to reject H0
i.e. there is a negative correlation between “refer to question”