Question: Look at the following 2 2 contingency table, taken from 150 participants: Drink tea Drink coffee Feel terrific 70 50 Feel lousy 30 80

Look at the following 2 × 2 contingency table, taken from 150 participants:

Drink tea Drink coffee Feel terrific 70 50 Feel lousy 30 80 There is something wrong with the above, in that the numbers in the cells should:

(a) Add up to 150

(b) Add up to 100

(c) Be equal

(d) Be analysed by a 4 × 3 χ2

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