Reference no: EM132256867

Nine experts rated two brands of coffee in a? taste-testing experiment. A rating on a? 7-point scale ?(1 equals = extremely ?unpleasing, 7 equals = extremely ?pleasing) is given for each of four? characteristics: taste,? aroma, richness, and acidity. The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts? (a) through? (d) below.

Click the icon to view table (BELOW)

Expert A B

C.C. 25 27

S.E. 26 26

E.G. 19 21

B.I. 23 25

C.M. 22 24

C.N. 24 25

G.N. 25 24

R.M. 24 25

P.V. 21 23

a. At the 0.01 level of? significance, is there evidence of a difference in the mean ratings between the two? brands?

Let μ1 be the mean rating for brand A and μ2 be the mean rating for brand B. Determine the null and alternative hypotheses for this test.

b. The test statistic is t Subscript tSTAT equals =-3.35. ?(integer or a decimal. Round to two decimal places as? needed.)

The critical? value(s) is(are) jQuery22405044388854039321_1552282735727?

.?(integers or decimals. Round to two decimal places as needed. Use a comma to separate answers as? needed.)

c. Determine the p value in (a) and interpret its meaning the test statistic gives a p-value of ???

.?(integers or decimals. Round to three decimal places as needed.)