Probability and significance

Question 1

What is the significance level accepted at psychology?

Answer 1

equal to or less than 0.05

Question 2

What significance level is accepted if their is human cost at risk?

Answer 2

equal to or less than 0.01

Question 3

What is a type 1 error?

Answer 3

• It is known as a optimistic error
• This occurs when the researcher accepts the alternative hypothesis and rejects the null hypothesis when there are no differences in the data

Question 4

What is a type 2 error?

Answer 4

• It is known as a pessimistic error
• This occurs when the researcher accepts the null hypothesis and rejects the alternative hypothesis and the differences in the data are ignored.

Question 5

Why is a 5% significance level used in psychology?

Answer 5

-to prevent the risk of a type I or type II error from occurring.