Inferential Statistics (2)

Question 1

Descriptive Statistics and Inferential Statistics

Answer 1

While descriptive statistics (mean, mode, median, range and standard deviation) help you organise and summarise data, inferential statistics help you draw conclusions.

Question 2

Inferential Statistics

Answer 2

Inferential statistics refer to the statistical tests applied to quantitative data with the purpose of analysing these data and be able to interpret the findings.

Question 3

Eight statistical tests:

Answer 3

1. Chi Square
2. Sign test
3. Mann-Whitney
4. Wilcoxon test
5. Spearman’s Rho
6. Related t-tests
7. Unrelated t-tests
8. Pearson’s rank (Pearson’s r)

Question 4

The choice of inferential test depends on:

Answer 4

1. What kind of investigation is being conducted; whether you want to investigate differences (between conditions) or associations (correlation).
2. If test of difference, what experimental design is employed; independent groups or related designs (this includes repeated measures and matched pairs design).
3. What type of data is collected; levels of measurement (nominal, ordinal, interval or ratio).

Question 5

Choice and Justification

Answer 5

(Refer to table in the booklet)