# Research Methods: Use of Inferential Analysis

HideShow resource information

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