Question

Cola makers test new recipes for loss of sweetness during storage. Trained tasters rate the sweetness before and after storage. Here are the sweetness losses ( sweetness before storage minus sweetness after storage) found by 10 tasters for one new cola recipe:

2	0.2	0.6	1.8	-0.4
2	-1.3	1	0.9	2.2

Take the data from these 10 carefully trained tasters as an SRS from a large population of all trained tasters.

Is there evidence at the 5% level that the cola lost sweetness? If the cola has not lost sweetness, the ratings after should be the same as before it was stored.

The test statisic is t =  (±±0.001)

No

Yes

Answer 1

The test statisic is t = 2.461

Is there evidence at the 5% level that the cola lost sweetness : Yes