10, 11, 12 Given specific sample data, such as the data given in which confidenc

Question

10, 11, 12

Given specific sample data, such as the data given in which confidence interval is wider: the 95% confidence Levels or the 80% interval? Why is it wider? Finding Critical Values. In Exercises 5-8, find the indicated critical z-value. Find the critical value z_alpha/2 that corresponds to a confidence level of 80%. Find the critical value z_alpha/2 that corresponds to a 99% confidence level. Find z_alpha/2 for alpha = 0.10. Find z_alpha/2 for alpha = 0.04. Formats of Confidence Intervals. In Exercises 9-12, express the confidence using the indicated format. (The confidence intervals are based on the orange, yellow, and blue Ms in Data Set 20 from Appendix B) Express the confidence interval 0.0641

Explanation / Answer

10) here phat=(0.186+0.0641)/2= 0.12505

margin of error E=(0.186-0.0641)/2=0.06095

hence CI =0.12505 -/+ 0.0605

11) p=(0.135+0.0268)/2=0.0809

E=0.0541

hence CI =0.0809-0.0541 <p<0.0809+0.0541

12) 0.270-0.087<p<0.270+0.087

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