Correlation

Question 1

Spearman’s Rank correlation

Answer 1

It is a measure of association.
Rank the data separately and in order, MENU 6-2, OPTN 3.
Use it when there is a non-linear relationship or the data are subjective or ranked.
However, it cannot detect linear correlation

H0: There is no association between
H1: There is an association between
Use a ______-tailed spearman’s rank test at the _% level using n=
Test Statistic = rs
Critical Region
[ [ [
[————[————-[
[ [ [
-1 0 1
Result ________significant
____________ Reject H0/H1
There is sufficient/insufficient evident to suggest a positive/negative association between

Question 2

Proportion test
(Binomial)

Answer 2

1.
H0: Pie = Probability
H1: Pie >
Pie <
Pie ≠
2. B ( n (sample size), Pie
3. Test stat x= observed number of successes
4. (Lower) P(X<X)
(Upper) P(X>X)
(Two-tailed) Do both then pick smaller and x2
5.. P-value is lower than sig. e.g. 5%