Chapter 12 Solutions

6 and 674 1234 a the confidence interval from exercise

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Unformatted text preview: east occasionally, is somewhere between 62.6% and 67.4% 12.34 a. The confidence interval from Exercise 12.26 was (0.626, 0.674). To find the error, take the width of the confidence interval and divide by 2. E = (0.674 - 0.636) / 2 = 1.024. b. E = 0.02; zα/2 = z0.025 = 1.96; ̂( ̂) ⁄ c. n = 2401; ̂ = 0.63; zα/2 = z0.025 = 1.96; ( )⁄ √ ( ) √ ( )⁄ d. The margin of error for the estimate is 0.019, which is less than what is required in part b. e. ̂ = 0.60; zα/2 = z0.025 = 1.96; part b: E=0.02, z0.025 = 1.96; sample size...
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This document was uploaded on 02/06/2014.

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