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A study showed that fourteen of 180 publicly traded business service companies failed a test for...

A study showed that fourteen of 180 publicly traded business service companies failed a test for compliance with Sarbanes-Oxley requirements for financial records and fraud protection. Construct a 92% confidence interval for the population noncompliance proportion Select one: a. (0.039, 0.117) b. (0.043, 0.113) c. (0.051, 0.104) d. (0.045, 0.111)

part (b) Based on the confidence interval in part (a), can you conclude that the population noncompliance proportion is different than 11 percent? Select one: a. Yes, because 11% is not within the lower and upper limits of the confidence interval b. No, because 11% is within the lower and upper limits of the confidence interval c. Yes, because 11% is within the lower and upper limits of the confidence interval d. No, because 11% is not within the lower and upper limits of the confidence interval

part (c) If the number of sampled companies was decreased to 100 while everything else is still the same, what happens to the confidence interval in part (a)? Select one: a. It becomes wider due to larger margin of error b. Can't tell from given information c. It can either become narrower or wider d. It becomes narrower due to smaller margin of error

math   Statistics-And-Probability   
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