Categorical data analysis Problem 4 Problem 4 A study was ca

Problem 4: A study was carried out to infer whether there is an association between mongolism in infants and hepatitis of the mother during pregnancy. a) State the appropriate statistical hypothesis to test the study?s finding. b) Is there any trouble with expected values here? c) Carry out the statistical analysis.

Solution

(a) We use Chi-square Contingency Table Test for Independence

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(b) No.

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(c) The test hypothesis:

Null hypothesis: there is no association between mongolism in infants and hepatitis of the mother during pregancey

Alternative hypothesis:there is an association between mongolism in infants and hepatitis of the mother during pregancey

		Mongoloid	Non-mongoloid	Total
Hepatitis	Observed	30	20	50
	Expected	0.88	49.13	50.00
	(O - E)