The proportion of defective computers produced by ABC Company is the subject of interest of a company manager. A random sample of 50 computers recently produced by ABC company was tested, revealing a total of 8 defective computers. a. Construct 95% confidence interval for the proportion of defective computers produced by ABC Company. Keep two digits after decimal point in the answer a. 95% confidence interval for the proportion of defective computers produced by ABC Company is b. At least how many computers should be included into the sample if company manager wants to be 99% confident that error in estimation of population proportion of defective computers produced by ABC company will be no more than 0.10? Number of computers that should be included into the sample is

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