A poll conducted among a nationwide random sample of 75 registered voters, asked

Question

A poll conducted among a nationwide random sample of 75 registered voters, asked those adults about their party affiliation and their gender. The results are shown in the table below.

What proportion of subjects are Democrat?  (round your answer to three decimal places)

This proportion is part of

marginal distribution of political party

conditional distribution of political party given gender

marginal distribution of gender

conditional distribution of gender give political party

Explanation / Answer

Solution :

Guiven that,

Democrate Republican Independent Total

Male 11 19 21 51

Female 14 6 4 24

Total 25 25 25 75

The proportion of subjects are Democrats = 25 / 75 = 0.333

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