Lecture 1

Question 1

What is a p value?

Answer 1

p is the probability of getting our observed
result, or a more extreme result, if the null hypothesis
is true

Question 2

How can you write out p in terms of conditional probabilities?

Answer 2

p(D|H0)

Question 3

Does p allow you to infer the local error rate?

Answer 3

NO

only know the global error rate of 5%

Question 4

Does NHST allow you to determine the probability of the null being true?

Answer 4

No, don’t be silly

Question 5

What can you say, assuming the null is true?

Answer 5

you have a 5% probability of getting the observed, or a more extreme result