Inferential Statistics Flashcards
1
Q
The Bionominal Test Steps
A
- To calculate the test you do score 1 - score 2
- Remove people who had the same score for both IV’s
- Count how many positives and negatives
- Put a circle around lowest and use observed value
- Compare my observed value (OV) to critical value (CV) for sign test to see if we found a significant result
2
Q
why to use the binominal sign test
A
- repeated measures (all do IV coke/pepsi)
- Experiment testing for a difference (pepsi + coke)
- Nominal data (prefer pepsi or coke total)
- Tests to see if there is a difference
3
Q
The Wilcoxon Test Steps
A
- Score 1 - (minus) score 2 and remove any with no difference between IV’s
- FOR NOW ignore wether the difference is a positive or a negative number just rank the number itself from lowest to highest
- look at the different column and count how many positive figures and how many negative figures there are
- the sum of the ranks of the least frequent is the observed value
- calculate the n (number of participants value)
- compare to the critical value table and write the significance statement
4
Q
why to use the wilcoxon test
A
- Repeated measures (everyone did left and right ear)
- Ordinal or interval data
- Testing for a difference between your ears
5
Q
why to use the spearmans rhos test
A
- tests for a relationship or association
- tests for a correlation
- ordinal and interval data
6
Q
The Spearmans Rhos Test Steps
A
- In the table, rank each co-varible, lowest to highest rank - if there are 2 or more of the same numbers in one co-varible count how many of the same number there are in their rank, add the rank up and divide by how many there are
- Calculate the difference between rank 1 minus rank 2 in the table
- Use the difference found and square the number
- Find the total of the difference squared
- Apply the formula for full working out
- Use the critical value table and find the value to see if it is a significant result
