Stats

Question 1

difference between t scores and z scores?

Answer 1

t scores are used when the population parameters are estimates

Question 2

what does internal validity and external validity mean?

Answer 2

internal means is corresponds only to the subjects and external means it represents the population it represents

Question 3

What is simply going on with a type 1 and type 2 error?

Answer 3

in type 1, they think there is a difference but there is not. They reject the null when they should accept it.

type 2, they think there is no difference so they accept the null when the alternative is correct.

Question 4

What does inadequate power lead to and when does it occur?

Answer 4

it occurs when there is not enough study subjects

it leads to type 2 errors