The proportions of blood types A, B, AB, and O in the population of all Caucasians in the United States are .41, .10, .04, and .45, respectively. To determine whether or not the actual population proportions fit this set of reported proportions, a random sample of 200 Americans were selected and their blood types were recorded. The observed and expected cell counts are shown in Table 14.2. The expected cell counts are calculated as E 5200 p i i. Test the goodnessof-

fit of these blood type proportions.

Transcribed Image Text:

Table 14.2 Counts of Blood Types A B AB Observed (O;) Expected (E;) 89 18 12 81 82 20 8 90