4) In a study of the Gender Aide method of gender selection, 1000 users of the m

Question

4) In a study of the Gender Aide method of gender selection, 1000 users of the method gave birth fo 540 boys and 460 girls. There is about a 1% chance of getting such extreme results if the method has no effect. a) Does the method have statistical significant? Explain. b) Does the method have practical significant? Explain. 5) When making random guesses for difficult multiple-choice test questions with possible answers of A, B, C, D, and E. We expect to get 20% answers correct. A student uses another method of guessing and get 23% answers correct. There is a chance of 26% of getting such result if this method is as good as guessing. a) Does the method used by the student have statistical significant? Explain. b) Does the method used by the student have practical significant? Explain. 6) A typical survey involves about 500 to 2000 subjects. An internet site sent out 50,000 emails to solicit response from its member and 2519 members responded to the survey. Determine whether the sampling method is sound or flaw. Explain why 8) After analyzing the sample data in question 8, a researcher conclude that there is a correlation between white blood cell counts and red blood cell counts, does it follow that higher white blood cell counts are the cause of higher red blood cell counts? Explain.

Explanation / Answer

Solution:-

4)

a) There is no statistical significance in this method becuase the p-value(0.01) is less than 0.05.

b) There is practical statistical significance in this method.

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