15.28 Can people really identify their favorite brandof cola? Volunteers tasted

Question

15.28Can people really identify their favorite brandof cola? Volunteers tasted Coca-ColaClassic,

Pepsi, Diet Coke, and Diet Pepsi, with theresults shown below. Research question:At = .05, is

the correctness of the prediction different forthe two types of cola drinkers? Couldyou identify

your favorite brand in this kind of test? Sinceit is a 2 ×2 table, try also a two-tailedtwo-sample

z test for1 = 2 (see Chapter 10) and verifythat z2 is the same as your chi-squarestatistic.Which

test do you prefer? Why? (Data arefrom Consumer Reports56, no. 8 [August 1991], p.519.)

Cola

Explanation / Answer

Thank you Donald Ironically I was at the coca cola factory in Atlanta. If you ever in Atl . You must go to taste the "sweetness" ofCOCA COLA aroud the world.

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