Question The education department has conducted a survey to review student's language ability. A sample of 40 boys and 40 girls have been selected randomly selected for an aptitude test. The test result is that 28 boys pass the test, and 32 girls pass the test. (a) Give a point estimate of the population proportion of boys can pass the aptitude test. (b) Give a point estimate of the population proportion of girls can pass the aptitude test. (c) Use the combined data of 80 students, give a point estimate of the population proportion of students can pass the aptitude test. (d) Use the combined data of 80 students, construct a 95% confidence interval estimate of the population proportion of students can pass the aptitude test.

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