Question

10. Accidental poisoning of children is arent concern to the Poison Control Center. For the years 1993 through 1995, records of poisoning among children were reviewed in an effort to identify areas of improvement for safety and regulation. In the past, 11% of all poisoning cases among children were serious enough to require hospitalization. It was found that 1009 of 7434 children in this study required hospitalization. (a) What assumptions are necessary and how are they satisfied in order to complete the desired test? (b) Is there evidence of an increase in the proportion of cases requiring hospitalization?

Answer 1

Ans: to: 4 = 32 vs Ha : M3 32 n=23, X=47.70 S = 40.45 Test Test statistic (t) = Statistic x-m - 467.7-32 (t) = 1 40.45/523 - 11.86 Critical value = 422,0.05 = (1.717) Since tstat > to, we refect Ho. There as enough evidence that these coustnies have exceeded the International mediam rate of 32 deaths per 1000. Valve - 05