Internal+Assessment

=**Internal Assessment**=

**Preliminary Reading**
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**Research Methods & Statistics**

 * Statistics for Psychology IA (Handout)**
 * Psych Student´s Gude to Statistics**

=**Central Tendency**=
 * Which Central Tendency should I use? **

Each measure of central tendency has its own strengths and weaknesses, so the one you choose to use may depend largely on the unique situation and how you are trying to express your data.
 * The mean __utilizes all numbers__ in a set to express the measure of central tendency; however, __**outliers can distort**__ the overall measure.


 * The median __**gets rid of** **disproportionately high or low scores**__, but it __**may not**__ adequately __**represent the full set of numbers**__.


 * The mode may be less influenced by outliers and is good at representing what is "**__typical__**" for a given group of numbers, but may be useless in cases where no number occur more than once.

Source: http://psychology.about.com/od/researchmethods/f/mean-median-or-mode.htm?nl=1 (retrieved 25 Sept. 2012)

[] [] Calculating Central Tendency and Measures of Dispersion Tools for calculating Central Tendency and Measures of Dispersion

**Which method should I use?**
Research Methods and Statistics Statistics and Research Methods Workshop

**Types of Inferential Statistic Tests**
Chi Squared [|Mann-Whitney U Test] [|Spearman's Rank Correlation] [|Wilcoxon Signed Rank]

What is the difference between categorical, ordinal and interval variables?

Why might you fail to replicate? Grade Boundaries for IA

**Forms You Will Need**


Calculate Chi Square online