Probability and Significance

Question 1

What is the Null Hypothesis and the alternative hypothesis?

Answer 1

• The Null hypothesis states there is ‘no difference’ between the conditions
• The alternative hypothesis states that there will be a difference (can be directional and non-directional)

Question 2

What is a Type 1 error?

Answer 2

• the null hypothesis is rejected and the alternative hypothesis is accepted (false positive)

Question 3

What is a Type 2 error?

Answer 3

• the null hypothesis is accepted and the alternative hypothesis is rejected (false negative)

Question 4

What is the ‘rule of R’?

Answer 4

• Those statistical tests with the letter R in the name are those where the calculated value must be equal to or more than the critical value.