19. (3 pts.) A community of 52,000 has recently developed cases of a disease not previously present in the population. T

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19 3 Pts A Community Of 52 000 Has Recently Developed Cases Of A Disease Not Previously Present In The Population T 1 (38.95 KiB) Viewed 21 times

19. (3 pts.) A community of 52,000 has recently developed cases of a disease not previously present in the population. They have averaged 32 new cases diagnosed each day, with a mean time to recovery of 8 days (based upon clearance of the organism from the blood). What would be the expected prevalence of the disease if a cross-sectional study was done? a. 256 cases b. 32 cases/day c. 4.9 cases per 1,000 people d. 0.62 cases per 1,000 people days e. Cannot be determined with the information provided 20. (3 pts.) When should a null hypothesis be rejected? a. When it is proven to be incorrect b. When it is deemed more improbable than probable c. When it is deemed improbable enough to warrant rejection (P<alpha) d. When it is deemed improbable enough to warrant rejection (P>alpha) 21. (3 pts.) John Snow's study of cholera demonstrated: a. How essential it is to assign study participants to treatment groups b. The value of observational studies in assessing risk factors associated with outbreaks c. Germ theory- Snow's work demonstrated a bacterium to be the causative agent of cholera d. The unimportance/lack of need for a comparison population- only the affected population needs to be studied