Probability and Significance

Question 1

What is Significance?

Answer 1

How sure we are about a correlation or diference existing

Question 2

What is a null hypothesis (N0)?

Answer 2

States there is no difference or correlation between the conditions

Question 3

What is an alternative hypothesis (N1)?

Answer 3

States there is a diference or correlation between the condition

Question 4

Which hypothesis do we reject if significant?RE

Answer 4

Reject null and accept alternative

Question 5

What is probability?

Answer 5

How likely it is for an event to happen

Question 6

What is the usual level of significant if psychology?

Answer 6

0.05 or less

Question 7

What is a significant P value in psychology?

Answer 7

0.05/ 5% or less

Question 8

What does a P value of 5% mean for research?

Answer 8

Probability of the difference in the study’s findings being down to chance is 5%

Question 9

What is the P value if the research has a risk such as human cost (drug trials)?

Answer 9

0.01/ 1%

Question 10

What is a Type 1 (optimistic) error?

Answer 10

Claiming a hypothesis is true but it isn’t
False positive

Question 11

What is a Type 2 (pessimistic) error?

Answer 11

Claiming a hypothesis is false but it is true
False negative