27. Although tea is the world s most widely consumed beverage after water, little is known about...
Question:
27. Although tea is the world s most widely consumed beverage after water, little is known about its nutritional value. Folacin is the only B vitamin present in any signi cant amount in tea, and recent advances in assay methods have made accurate determination of folacin content feasible. Consider the accompanying data on folacin content for randomly selected specimens of the four leading brands of green tea.
Brand Observations 1 7.9 6.2 6.6 8.6 8.9 10.1 9.6 2 5.7 7.5 9.8 6.1 8.4 3 6.8 7.5 5.0 7.4 5.3 6.1 4 6.4 7.1 7.9 4.5 5.0 4.0
(Data is based on Folacin Content of Tea, J. Amer.
Dietetic Assoc., 1983: 627—632.) Does this data V1u ˆ 2 1m1 m2 m3 m4 2 4
1m5 m6 2 2
suggest that true average folacin content is the same for all brands?
a. Carry out a test using a .05 via the P-value method.
b. Assess the plausibility of any assumptions required for your analysis in part (a).
c. Perform a multiple comparisons analysis to identify signi cant differences among brands.
Step by Step Answer:
Modern Mathematical Statistics With Applications
ISBN: 9780534404734
1st Edition
Authors: Jay L Devore