A blind taste test is done to compare Cola 1 and Cola 2. Among n =...
A blind taste test is done to compare Cola 1 and Cola 2. Among
n = 130 participants, p̂ = 0.68 is the proportion
preferring Cola 1. If, actually, the two colas are equally
preferred in a larger population of tasters, p = 0.5 is
the corresponding population proportion. Assuming that p =
0.5, find the value of the standardized statistic
(z-score) for the sample proportion observed in the taste
test. (Give the answer to three decimal places.)
z =
You may need to use the appropriate table in the Appendix of Tables
to answer this question.
Homework Answers
Test statistic,
z = (pcap - p)/sqrt(p*(1-p)/n)
z = (0.68 - 0.5)/sqrt(0.5*(1-0.5)/130)
z = 4.105
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