Psychology - Research methods - Inferential Analysis

Question 1

What are non-parametric tests?

Answer 1

chi squared, mann whitney, wilcoxon, spearman’s rho

Question 2

How do you find out if the results are significant (show a real difference)?

Answer 2

Compare results gained from a statistical test to critical values

Question 3

How do you find if a Spearman Rho test is significant?

Answer 3

Calculated value must be greater than or equal to the critical value

Question 4

How do you find out if a Mann Whitney test is significant?

Answer 4

Calculated value must be less than or equal to the critical value

Question 5

What is a critical value?

Answer 5

a numerical value that helps determine the significance of the results

Question 6

When is a Spearman’s Rho test used?

Answer 6

When we test a relationship/correlation, using ordinal data, related pairs

Question 7

What does N stand for in Spearman’s Rho?

Answer 7

Number of observations

Question 8

What does d stand for in spearman’s rho?

Answer 8

Difference between the two ranks of each observation

Question 9

When is a Mann Whitney test used?

Answer 9

Used for a test of difference, independent group design, ordinal data

Question 10

What does Na stand for in a Mann Whitney U Test?

Answer 10

Total number of scores in condition A

Question 11

What does Nb stand for in Mann Whitney U Test?

Answer 11

Number of scores in condition B

Question 12

What does T stand for in Mann Whitney U test?

Answer 12

Sum of ranks in a smaller sample

Question 13

How do you find out if a Chi Squared test result is significant?

Answer 13

Calculated value is greater or equal to the critical value

Question 14

How do you find if a Wilcoxon test result is significant?

Answer 14

Calculated value is less than or equal to the critical value

Question 15

When can Chi squared be used?

Answer 15

Test of association or difference, Independent measures design, nominal

Question 16

What does the term observed value mean?

Answer 16

The calculated value

Question 17

What are degrees of freedom?

Answer 17

the number of values in the final calculation of a statistic that are free to vary

Question 18

When is a Wilcoxon test used?

Answer 18

Test of difference, repeated measures or matched, ordinal data

Question 19

To work out wilcoxon matched pairs design results what do you calculate?

Answer 19

Positive ranks and negative ranks

Question 20

What does T stand for in the wilcoxon test?

Answer 20

smaller value between sum of negative or positive ranks

Question 21

What are the parametric statistical tests?

Answer 21

Related t-test, Unrelated t-test and Pearsons R

Question 22

How should you find the significance of parametric tests (Related/unrelated t-test and Pearsons R)?

Answer 22

Calculated value must be greater than or equal to the critical value

Question 23

When is the related t-test used?

Answer 23

Interval data, testing for a difference, repeated measures/matched pairs design

Question 24

When is the unrelated t-test used?

Answer 24

Interval data, testing for a difference, independent measures design

Question 25

When is Pearson’s r used?

Answer 25

Parametric test used for correlation when data is at interval level