《Chapter5EnumerationInference》由会员分享，可在线阅读，更多相关《Chapter5EnumerationInference（34页珍藏版）》请在金锄头文库上搜索。
1、1234Mean of iodine concentration in well water（g/L）nPatientsPrevalance （%）458.25 (Group A)3315591.78825.95 (Group B)32151805.605 p(1 p)Sp = n p(1 p)Sp = n67u valueP valueStatistical conclusions1.960.05H0 is not rejected，no significant result.1.960.05H0 is rejected，there is a significant result2.580.
2、01H0 is rejected，there is a highly significant result89101112Mean of iodine oncentrations in well water（g/L）nPatientsPrevalance （%）458.25 (Group A)3315591.78825.95 (Group B)32151805.60 Group A：n1 = 3315, p1 = 1.78% = 0.0178, 1-p1=1-0.0178=0.9822Group B：n2 = 3215, p2 = 5.60% = 0.0560, 1-p2 = 1-0.056=
3、0.9440 131415The observation from our results is called actual value (A) The one we would expect is called theoretical value (T) 1617GroupEffect (+)Effect (-)TotalEffective rate%）Chemiotherapy19(a)24(b)4344.2Chemio+ Radio therapy34(c)10(d)4477.3Total53348760.918GroupEffect (+)Effect (-)TotalChemioth
4、erapy19 (26.2)24 (16.8)43Chemio + Radio therapy34 (26.8)10 (17.2)44Total533487The table above is called fourfold table or 22 contingency table 1920212223Medium AMedium BTotal+-+11 (a)9 (b)20- 1 (c)7 (d) 8Total12162824252627ResultsOrient of apartmentsTotalSouthWestEastNorthRickets (+)1801412065379Rickets (-)200168433333Total3803020498712Incidence (%)47.446.758.866.353.2282930313233谢谢观赏！谢谢观赏！
