One Proportion z-Test - Troy High School

One Proportion z-Test. Dayton Area Drug Survey is a simple random sample. 60*0.70 = 42 ≥ 10 . 60*0.30 = 18 ≥ 10. Population of Dayton area seniors is greater than 10*60 = 600: The proportion of Dayton area seniors that drink is 70%. The proportion of Dayton area seniors that drink is not 70%. = = -3.098898934. p-value = 0.0019425488 ................
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