We asked a group of 50 participants whether they liked watching rugby. We made them watch a game, and then asked them whether they liked watching rugby again. We recorded the data as shown below....

We asked a group of 50 participants whether they liked watching rugby. We made them watch a game, and then asked them whether they liked watching rugby again. We recorded the data as shown below. Would χ2 calculated on such a table be appropriate? Why, or why not?