Statistics z Score Demo Demo Experiment Run Experiment

Statistics z Score Demo

Jaap Murre

This shows how to use the built-in z-score statistical function.

stat.Z() accepts a p-value (between 0 and 1) and returns the z-score. E.g., stat.Z(.5) gives 0.0. Try out other values. Also show is how to transform a z-score to an IQ score (mean is 100 and SD is 15).

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input("Type a percentile (0 to 100)","perc");

var zscore = stat.Z(response.perc/100);

text("z-score is " + zscore.toFixed(2) + "<br>" 
    + "IQ score is: " + (zscore*15+100).toFixed(1));


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