Probability and Significance

Question 1

What does probability mean?

Answer 1

Measure of likelihood that a particular event will occur where 0 indicates statistically impossible and 1 statistically certainty

Question 2

What does significance mean?

Answer 2

Statistical term that tells how difference or correlation exists

Question 3

What does a significant result mean?

Answer 3

Reject the null hypothesis

Question 4

What is critical value?

Answer 4

The numerical boundary between acceptance and rejection of the null hypothesis

Question 5

What is a type 1 error?

Answer 5

• The incorrect rejection of true null hypothesis (false positive)
• Too lenient

Question 6

What is a type 2 error?

Answer 6

• The failure to reject a false null hypothesis (a false negative)
• Too strict

Question 7

What is the null hypothesis?

Answer 7

States there is ‘no difference’ between the condition

Question 8

What does the statistical test determines?

Answer 8

Hypothesis is ‘true’ and thus whether we accept or reject the null hypothesis

Question 9

What is the usual significance used in psychology?

Answer 9

0.05 or 5%

Question 10

How do you know when a statistical test is significant or not?

Answer 10

The rule of R
-The statistical test with the letter ‘R’ in the name the calculated value must be equal to or more than the critical value