=+plant, a 250-lb sample is taken out of every batch of aspirin, and the number of off-color flaws is counted.

The following table shows the numbers of flaws per 250-lb sample for a period of 25 days:

Number Number Day of flaws Day of flaws 1 46 10 44 2 51 11 47 3 56 12 51 4 57 13 46 5 37 14 49 6 51 15 48 7 47 16 59 8 34 17 53 9 30 18 61