A sample poll of 300 voters from District A and 200 from District B showed 56% and 48% respectively in favour of a candidate. At a 5% level of significance, test the hypotheses that (a) there is a difference between the districts, (b) the candidate is preferred in District A.
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Hypothesis testing has come up 47 times in 7 exams since 2007.
This question is on Tests for means, proportions and variances, part of Hypothesis testing in Statistics.
Applying z, t, F and chi-square tests to common problems.
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Question from the DSE 2007 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.