10.5.3 In a classic study of peptic ulcer, blood types were determined for 1,655

Question

10.5.3 In a classic study of peptic ulcer, blood types were determined for 1,655 ulcer patients. The accompanying table shows the data for these patients and for an independenty chosen group of 10,000 healthy controls from the same city Blood type Uicer patients Controls 911 4,578 579 4,219 124 800 AD 41 313 Total 1,655 10 000 a The value of the ch-square statisic for this contingency table is -490 Carry out the chisquare tos af a 0.0 b. Construct a table showing the percentage distributions of blood type for patients and for controls c. Verity the value of given in part (a)

Explanation / Answer

here from above dividing each cell in control group by 100 ;

below is percentage distribution:

b) applying chi square goodness of fit test on above:

rom above test statistics 49.0155 ; whcih is in sync with part(a|)

group Probability O 45.78% A 42.19% B 8.90% AB 3.13%

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