Session 3

Question 1

If the correlation coefficient r is -1, what does it mean ?

Answer 1

If r = -1, it means that you have a perfect negative correlation

Question 2

If the correlation coefficient r is equal to 0, what does it mean ?

Answer 2

R = 0 Means No linear relationship between the two variables

Question 3

What does spurious relationship mean ?

Answer 3

Curious relationship

Question 4

What are the type of experimental research ?

Answer 4

1) Laboratory experiments (ex: SONA)
2) Field experiments
3) Other field studies and natural experiments

Question 5

What are the advantages and disadvantages of laboratory experiments ?

Answer 5

Advantages :

Disadvantages :

Question 6

What is a T-Test ?

Answer 6

It’s a test to decide if you keep the null hypothesis and the alternative hypothesis.

Question 7

What is the equation for T test ?

Answer 7

signal / noise = difference between group means / variability of groups

Question 8

When can you reject the none hypothesis ?

Answer 8

When your p-value is lower than a value.

Question 9

When can you reject the none hypothesis ?

Answer 9

When your p-value is lower than a value.

Question 10

What is power ?

Answer 10

Statistical power is the likelihood that a study will detect an effect when there…