Day 17

Question 1

Parametric statistics

Answer 1

Parametric tests-calculation are based on assumption about population parameters (eg. pop variance)

Question 2

Nonparametic statistics

Answer 2

AKA Distribution-free test), are used when the assumptions for parametric tests are not met.

Question 3

Non parametric test are useful

Answer 3

Nonparametric test are useful when -rank ordering cases are in easier that precise measurment of a variable.

Question 4

Original scores

Answer 4

Original scores violate the assumptions of a statistical test (eg. normally distributed pop. homogenity of variance). There is unusually high variance, there are undetermined scores (eg. the subjects does not finish task)

Question 5

The Chi Square and goodness of fit

Answer 5

Used for one-way design in which each case is classified into one category.

Question 6

Observed frequencies

Answer 6

The number if individuals in each category predicted by the null hypothesis. Observed frequencies are compared to expected