The manufacturer of a brand of smartphone wishes to know what its customers think about the performance of the phone before and after introducing a new processor. The manufacturer selects, at random, ten customers. Each customer is given a phone without the new processor and a phone with the new processor. Each customer is then asked to rate 'on a scale of 1-20' the performance of each smartphone (20 being the best).

Test, at the 5% significance level, whether customers think that the phone with the new processor is better.

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A. F G H. Original processor 15 17 13 17 14 12 13 7 7 10 New processor 12 15 18 18 10 19 19 15 17 19