inferential stats

Question 1

what type of data is used in: chi squared

Answer 1

nominal data

named categories e.g. boy/girl

Question 2

what type of data is used in: mann whitney

Answer 2

ordinal data

ordered data e.g. place in a race

Question 3

what type of data is used in: wilcoxon signed rank

Answer 3

ordinal data

ordered data e.g. place in a race

Question 4

what type of data is used in: spearman rho’s

Answer 4

ordinal data

ordered data e.g. place in a race

Question 5

with what research method is chi squared used

Answer 5

independent groups design

Question 6

with what research method is mann whitney used

Answer 6

independent groups design

Question 7

with what research method is wilcoxon used

Answer 7

repeated measures / matched pairs

Question 8

what does the chi squared test, test for?

Answer 8

Test of difference (experiment) with independent groups design

Question 9

what does the mann whitney test, test for?

Answer 9

Test of difference (experiment) with independent groups design

Question 10

what does the wilcoxon test, test for?

Answer 10

You have a test of difference (experiment) with repeated measures design or matched pairs design

Question 11

what does the spearmans test, test for?

Answer 11

You have a test of relationships (correlation) of two independent variables

Question 12

what the results have to be in order to be significant in the chi-squared test?

Answer 12

the observed value is larger than the critical value

Question 13

what the results have to be in order to be significant in the mann whitney test?

Answer 13

U value is smaller than the critical value

Question 14

what the results have to be in order to be significant in the wilcoxon test?

Answer 14

T value os smaller than or equal to the critical value

Question 15

what the results have to be in order to be significant in the spearman test?

Answer 15

Observed value is bigger than or equal to the critical value

Question 16

what is ordinal data

Answer 16

• ordinal data is quantitative data which is placed into some kind of order or scale
• an example of ordinal data is rating happiness on a scale of 1-10.

Question 17

what is nominal data

Answer 17

• type of qualitative data that groups variables into categories
• these categories as nouns or labels; they are purely descriptive, they don’t have any quantitative or numeric value, and the various categories cannot be placed into any kind of meaningful order or hierarchy.

Question 18

difference between mann whitney and chi squared?

Answer 18

• chi-square tests which can measure independence of data or goodness of fit
• while the Mann-Whitney U test compares the likelihood of some data being larger or smaller than other data