Green tea is known to contain high quantities of epigallocatechin (EGCG), a poly

Question

Green tea is known to contain high quantities of epigallocatechin (EGCG), a polyphenol with potent antioxidant and anticarcinogenic properties. You collect 50 samples of Brand A green tea, 75 samples of Brand B green tea, and measure the EGCG concentration of each sample. What analysis would you use to see if Brand A contains a significantly higher EGCG concentration than Brand B?

Select one:

a. One-sample Z-test

b. One-sample t-test

c. t-test for paired observations

d. Two Factor ANOVA

e. t-test for two independent groups

Explanation / Answer

Solution:

(b). is the correct answer. t-test for paired observation.

We can use a one-sample t test to see if the mean dierence score is signicantly dierent from a constant.

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