Question 16: Comparison of Milk Fat Measuring Methods Two methods of determining fat content in milk are being tested. Samples are taken from 6 different milk cartons and both methods are used on a sample from each container. The readings are

Carton	1	2	3	4	5	6
Method A:	2.2	1.7	2.0	1.9	2.1	2.3
Method B:	1.8	2.1	1.9	1.4	2.1	1.7
(A-B)	.4	-.4	.1	.5	0	.6

From Minitab Output: N Mean StDev Method A 6 2.033 .216 Method B 6 1.833 .266 Difference 6 .200 .374

To test the null hypothesis H₀ that there is no difference in the two methods of determining fat content, the observed value of the test statistic is: A: 1.20 B: 2.73 C: 1.02 D: 1.31 E: 3.30