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Question: problem 5 of a random sample of 381 highquality investment...

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Problem 5. Of a random sample of 381 high-quality investment equity options, 191 had less than 30% debt. Ofan independent random sample of 166 high-risk investment equity options, 145 had less than 30% debt. (a) Test, against a two-sided alternative, the null hypothesis that the two population proportions are equal. Use 5% significance level. (b) Find 95% two-sided confidence interval for the difference of the two population proportions.
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