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TASPsychologyQuick questions
Unit 3: Individual Behaviour
Quick questions on Data Analysis and Statistics - TCE Psychology (Tasmania)
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is types of data?Show answer
Quantitative data are further split into levels of measurement: nominal (categories, such as favourite colour), ordinal (ranked, such as finishing position) and interval or ratio (equal intervals, such as temperature or time). The level you have limits which summary is appropriate.
What are distributions?Show answer
In a normal distribution, scores form a symmetrical bell curve where the mean, median and mode coincide and most scores fall near the centre. Data can also be skewed: a positive skew has a tail of high scores pulling the mean above the median, while a negative skew has a tail of low scores. Recognising skew tells you that the median may describe the typical score better than the mean.
What is interpreting correlation?Show answer
A correlation coefficient (r) summarises the strength and direction of a relationship between two variables, running from minus 1 to plus 1. A value near plus 1 is a strong positive relationship (both rise together), near minus 1 is a strong negative relationship (one rises as the other falls), and near 0 means little or no linear relationship.
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