A survey of 200 ninth-graders found that 315 had used

Reference no: EM13633078

A survey of 200 ninth-graders found that 31.5% had used cigarettes in the past week, and a survey of 250 high-school seniors found that 35.2% had used cigarettes in the past week. Is there significant difference between the two corresponding population proportions?

(a) State the hypotheses.

(b) Using a 5% significance level, determine the rejection and non-rejection regions.

(d) Calcualte the p-value, and interpret the result.

(e) Construct a 95% confidence interval for the difference between the two proportions, and answer the original research question.

Details are welcome, as much as possible.

Reference no: EM13633078

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