Week 7

Question 1

Blind experiment

Answer 1

Subjects do not know which treatment they are getting.

Question 2

Double Blind

Answer 2

the experimenters also do not know which treatment the subjects are receiving

Question 3

Null hypothesis, H0

Answer 3

‘nothing is really happening’

Question 4

P value

Strong= 0-0.01
Moderate=0.01-0.05
Weak=0.05-0.1
Inconclusive=0.1-1

Answer 4

• the probability of obtaining such unusual data
• small p value H0 may be wrong, giving evidence for second explanation
• large p-value suggests that the data are consistent with the null explanation, giving inconclusive evidence of an effect