Use of Inferential Analysis
- Each statistical or inferential test involves taking the data collected in a study and doing calculations which produce a single number called the observe (or calculated) value.
- To decide if the observed value is significant, this figure is compared to another number found in a table of critical values.
- This is called the critical or table value.
- To determine whether the result is significant you need to compare the calculated and table values.
A) Spearman's Rho -
Spearman's Rho is used to correlate pairs of scores that are at least an ordinal level of measurement.
To find the critical/table value you need to know:
- Whether you have a directional or non-directional hypothesis
- The level of significance
- The number of ppts in each group
If the observed/calculated value of U is equal to or less than the critical/table value, the null hypothesis can be rejected.
B) Mann-Whitney -
Mann-Whitney test is a test of difference. Can be used when data is at least ordinal…