Historically, the proportions of all Caucasians in the United States with blood
Chapter 14, Problem 14.1(choose chapter or problem)
Historically, the proportions of all Caucasians in the United States with blood phenotypes A, B, AB, and O are .41, .10, .04, and .45, respectively. To determine whether current population proportions still match these historical values, a random sample of 200 American Caucasians were selected, and their blood phenotypes were recorded. The observed numbers with each phenotype are given in the following table. A B AB O 89 18 12 81 a Is there sufficient evidence, at the .05 level of significance, to claim that current proportions differ from the historic values? b Applet Exercise Use the applet Chi-Square Probability and Quantiles to find the p-value associated with the test in part (a).
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