Can you compare the spread of the variables grades in maths and English. What measures do you use? What do they tell you?
To look at the spread of values for these two continuous variables we use the standard deviation. We can find the standard deviation in the first box of our output:
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We can see that the standard deviation for English is 10.4, and for maths it is 12.2. This means that pupils’ maths results vary more than do their English results. In other words, in maths, pupils are more likely to score either much higher or much lower than the mean than they do in English, where scores are more bunched together around the mean.
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