A study compared the rates of serious cardiovascular problems for diabetic patie
ID: 3296466 • Letter: A
Question
A study compared the rates of serious cardiovascular problems for diabetic patients on rosiglitazone and pioglitazone treatments. The table below summarizes the results of the study. Where appropriate and unless otherwise stated, round your answer to three decimal values. 'n Studie het die koers van emstige kardiovaskulere probleme vir diabetiese pasiente op rosiglitazoon en pioglitazon behandelings vergelyk. Dies onder staande table som die resultate van die studie op. Waar toepaslik en tensy anders vermeld, rond jov antwoord na nrie desimale waardes. What proportion of all patients had cardiovascular problems? Watter proporsie van alle pasiente het kardiovaskulere probleme gehad? If the type of treatment and having cardiovascular problems were independent (null hypothesis), about how many patients in the rosiglitazone group would we expect to have had cardio-vascular problems?Explanation / Answer
a)
Total patients have cardiovascular problem = 2672 + 6019 = 8691.
Total patients = 83919
Proportion of all patients had cardiovascular problem = 8691 / 83919
= 0.10356
= 0.104 (Approximated to three decimal places)
b)
Expected value is calculated as row total * column total / table total.
Expected patients in rosiglitazone group to have had cardiovascular problem = 41169 * 8691 / 83919
= 4263.633
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