T Test

Question 1

T test

Answer 1

Test for non random association between a discrete categorical variable and continuous/discrete quantitive variable

Question 2

Mean

Answer 2

Average quantity of the dependent variable

Question 3

A T- test examines associations between which two general types of variables?

Answer 3

Discrete categorical variable and continuous/ discrete quantitive variable
Discrete vs continuous

Question 4

Which general type is always the independent variable?

Answer 4

Categorical

Question 5

Which is the dependent variable?

Answer 5

Continuous variable

Question 6

What does the p-value of a T-test represent ?

Answer 6

The probability that the same or more extreme observations could have been made if the null hypothesis was true

Question 7

What is the null hypothesis of a T-test?

Answer 7

There is not difference in the means of the two categories being compared

Question 8

What impact does sample size have if the difference in the means of some variables(i.e number of children) from two different categories (i.e geographic location) is small?

Answer 8

Small difference or correlation is more likely to be statistically significant when the sample size is very high