The T test Flashcards
understand the t test
1
Q
Describe the T distribution
A
- Similar in shape to the normal distribution
- Indexed by the number of observations minus one
2
Q
What is a T-test used for?
A
Measuring discrepancies between the Null hypothesis and the data estimate
3
Q
What does the value of the T-test tell us ?
A
How much the data estimate strays from the truth given the assumptions of the Null hypothesis
4
Q
What is the p-value?
A
The probability of observing the T-test value given the assumptions of the Null hypothesis
- P-value high –> fail to reject Ho
- P-value small–> reject Ho
5
Q
What is the hypothesis t-test value given by?
A
The estimate minus the hypothesised value all divided by the standard error
