Question: Dissolution is compared for three experimental batches of tablets with the following results (each point is the time in minutes for 50% dissolution for a single tablet).

Batch 1: 15 18 19 21 23 26

Batch 2: 13 10 16 11 9

Batch 3: 17 18 24 20

(i) Is there a significant difference between batches?

(ii) Which batch is different?