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Nine experts rated two brands of coffee in a taste-testing experiment.

Nine experts rated two brands of coffee in a​ taste-testing experiment. A rating on a​ 7-point scale

​(1equals=extremely unpleasing, 7equals=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.


Expert Brand A Brand B

C.C.     26        27

S.E.     25        25

E.G.    19        22

B.I.      21        22

C.M.    22        23

C.N.     26        27

G.N.    25        24

R.M.    24        26

P.V.     22        23


The test statistic is tSTATequals=.

​(integer or a decimal. Round to two decimal places as​ needed.)

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