Probability and significance Flashcards
1
Q
What is a null hypothesis?
A
A prediction of no relationship between variables studied
2
Q
What is an alternative hypothesis?
A
A testable statement of a relationship (difference, correlation, association) between variables
3
Q
What is P<0.05?
A
A less than 5% probability that any difference has occurred by chance
4
Q
What is P<0.01?
A
A less than 1% probability that any difference has occurred by chance
5
Q
What is a Type 1 error?
A
The null hypothesis has been wrongly rejected
6
Q
What is a Type 2 error?
A
The null hypothesis has been wrongly accepted
