2.2.12 - Inferential statistics decisions

2.2.12 (List B) Decision making and interpretation of inferential statistics:.; levels of measurement.; Wilcoxon signed ranks test of difference (also covering Spearman's rank correlation coefficient (formula) and Spearman's rank (critical values table) and Chi-squared distribution once Unit 2 has been covered).; probability and levels of significance (p≤.10 p≤.05 p≤.01).; observed and critical values, and sense checking of data.; one- or two-tailed regarding inferential testing.; type I and type II errors.

Use - inferential statistics decisions to connect the rule to the data and decision in the question.

This matters because - inferential statistics decisions determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - inferential statistics decisions to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Inferential statistics decisions is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.