Answered: Nine experts rated two brands of coffee…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.3: Using Data Displays

Problem 1E

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Transcribed Image Text:Data table Expert C.C. S.E. E.G B.I. C.M. C.N. G.N. R.M. P.V. Brand A 24 25 19 22 22 24 27 21 22 Brand B 25 25 21 24 24 25 26 22 23

Transcribed Image Text:Nine experts rated two brands of coffee in a taste-testing experiment. A rating on a 7-point scale (1 = extremely unpleasing, 7 = 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 the data table. 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. A. Ho: HD=0 (where HD = H1-H₂) H₁: HD #0 OC. Ho: HD 0 (where HD H1-H₂) H₁: HD=0 The test statistic is tSTAT=_- (Type an integer or a decimal. Round to two decimal places as needed.) OB. Ho: HD 20 (where HD H1-H₂) H₁ HD <0 O D. Ho: HD ≤0 (where HD H1-H₂) H₁: HD >0

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