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In 2010, the population of Ontario was 13 million persons. Medical records reveal that there were...

In 2010, the population of Ontario was 13 million persons. Medical records reveal that there were 100,000 Ontarians diagnosed with rheumatoid arthritis (RA) on January 1 2010. Sixty (60) cases of rheumatoid arthritis were diagnosed in Ontario between January 2 2010 and December 31 2010. The population did not change between January 1 2010 and December 31 2010. Which of the following statements concerning the frequency of RA among Ontarians in 2010 is/are TRUE?

  • A. The incidence of RA in Ontario in 2010 = 100,000 / 13 million
  • B. The prevalence of RA in Ontario on January 1 2010 = 100,000 / 13 million
  • C. The prevalence of RA in Ontario on December 31 2010 = 100,000 / 13 million
  • D. The prevalence of RA in Ontario on January 1 2010 = 100,000 / 13 million
  • E. The prevalence of RA in Ontario on December 31 2010 = 60 / 13 million
math   Statistics-And-Probability   
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Answer #1

The prevalence of RA in Ontario on January 1 2010

= 100,000/ 13 million

The prevalence of RA in Ontario on December 31 2010 = 60/13 million

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