Enabling students to understand and analyse contemporary issues in science and technology

A2 Data and their limitations Activities & Weblinks

Activities

The following activities develop ideas about data.
These ideas are also referred to in other activities.

Errors
Notes on the meaning of Reliability, Validity and Accuracy from BEEP http://www.beep.ac.uk/content/573.0.html.

Explanation of random and systematic errors in physical measurements

Explanation of random and systematic errors in social research
http://www.socialresearchmethods.net/kb/measerr.php

Mean, median, mode and spread of data. Sampling
A useful guide on how to read statistics for journalists, with explanations of things like standard deviation and margin of error.
http://nilesonline.com/stats/index.shtml

Very basic reminder on meaning of mean, median and mode from BBC

Explanation of measures of dispersion, range, interquartile range and standard deviation from the Open University
http://openlearn.open.ac.uk/mod/resource/view.php?id=163569

A useful glossary of statistical terms
http://www.stats.gla.ac.uk/steps/glossary/alphabet.html

Presentation and analysis
An explanation of box and whisker plots from an Open University course.
http://openlearn.open.ac.uk/mod/resource/view.php?id=165499

Another explanation of interquartile range and box and whisker plots
http://www.purplemath.com/modules/boxwhisk.htm

Some advice on the used of charts and graphs for health statistics.
http://www.health.state.pa.us/hpa/stats/techassist/tools.htm

An explanation of the scale on a log graph
http://www.intmath.com/Exponential-logarithmic-functions/7_Graphs-log-semilog.php