Inferential Statistics Flashcards
What are inferential statistics?
These are statistics that use the data collected from a sample to make inferences about the behaviour of the entire target population
What are statistical tests?
The mathematical tools researchers use to determine if results are significant
What are the 8 statistical tests?
1) Sign test
2) Mann - Whitney U test
3) Wilcoxon
4) Unrelated t - test
5) Related t - test
6) Spearman’s rho
7) Pearson’s r
8) Chi - squared
When results are significant, which hypothesis is accepted?
When you get significant results, you accept the alternative hypothesis
When results are insignificant, which hypothesis is accepted?
When the results are insignificant, the null hypothesis is accepted
What type of data does the sign test collect?
Is the calculated value less than or greater than the critical value?
What type of study is the sign test used with?
The sign test is used when looking at the difference between variables and using repeated measures design
Nominal data is collected and the calculated observed value is always equal to or less than the critical value
When is Mann Whitney test used?
What type of design is it used with?
What type of data is collected with this test?
Is the calculated value less than or greater than the critical value?
The Mann Whitney U test is used for testing difference, uses an independent measures design and collects ordinal data
The calculated observed value is always equal to or less than the critical value
What is the wilcoxon test a test of?
What design measure is used for the wilcoxon test?
What level of measurement is used?
Is the observed value less than or greater than the critical value?
The wilcoxon test is a test of difference. It uses the repeated measures design and collects ordinal data.
The observed value is always equal to or less than the critical value
What is the unrelated T test a test of?
What design measure is used for the unrelated T test?
What level of measurement is used?
Is the observed value less than or greater than the critical value?
The unrelated T test is a test of difference
It uses the independent measures design
Interval data is collected and the calculated observed value is equal to or more than the critical value
What is a type one error?
This is when a psychologist wrongly accepts the alternative hypothesis
What is the chi - squared test a test of?
What design measure is used for the chi squared test?
What level of measurement is used?
Is the observed value less than or greater than the critical value?
The chi squared test is a test of difference
The independent measures design is used
Nominal data is collected and the calculated obsevred value is equal to or more than the critical value
What is the related T test a test of?
What design measure is used for the related T test?
What level of measurement is used?
Is the observed value less than or greater than the critical value?
The related T test is a test of difference
The repeated measures design is used
Interval data is collected and the calculated observed value is equal to or more than the critical value
What is the spearman’s rho test a test of?
What level of measurement is used?
Is the observed value less than or greater than the critical value?
The spearman’s rho is a test of correlation
Ordinal data is collected and the calculated observed value is equal to or more than the critical value
What is the pearsons r test a test of?
What design measure is used for the pearsons r test?
What level of measurement is used?
Is the observed value less than or greater than the critical value?
Pearsons r test is test of correlation
Interval data is collected and the calculated observed value is equal to or more than the critical value
What is a type two error?
This is when a psychologist wrongly accept the null hypothesis
