.In a taste experiment nine experts rate the taste of Merlot from two different vineyards (A and B). The ratings are done on a 7-point scale, covering aroma, body, acidity and character.

Expert	Merlot A	Merlot B
1	25	27
2	26	26
3	19	22
4	18	20
5	24	27
6	22	25
7	27	26
8	22	23
9	25	27

a.What is the appropriate test to apply to this problem? What criteria did you use in selecting the test?

b. At the .05 level of significance, is there a difference between the mean ratings for the two vineyards?