Groups of children from four different classes in a school were randomly selected and sat a test,

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Groups of children from four different classes in a school were randomly selected and sat a test, with the following test scores:

Class Pupil 1 3 4 5 6 7 54 2.


(a) Test whether there is any difference between the classes, using the 95% confidence level for the test.

(b) How would you interpret a ‘significant’ result from such a test?

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