(c) Show.r all steps to construct a 99% confidence interval estimate of the proportion of all human resource professional believing that the appearance of a job applicant is most important for a good rst impression . Check your solution using Excel and post a screenshot on Crowdmark. {d} lIZJonstruct an S0933 confidence interval estimate of the proportion of all human resource professional believing that the appearance of a job applicant is most important for a good first impression 1 Check your solution using Excel and post a screenshot on Crowdmark. e] As the level of condence decreases what happens to the width of the condence interval? {f} If the level of confidence stays constant and the sample size increases what happens to the width of the confidence interval? 4. You plan to develop a new software system that you believe will surpass the success of Google and Faeebook combined . In planning for the operating system that you will use, you need to estimate the percentage of computers that use Windows. How many computers must be surveyed in order to be 99% confident that your estimate is in error by no more than one percentage point '1' (a) Assume that nothing is known about the percentage of computers with 'Windows operating systems. [b] Assume that a recent survey suggests that about 93% of computers use Windows operating systems [based on data from Net Applications :|. {c} Does the additional survey information from part {b} have much of an effect on the sample size that is required 'E' 5. A bath soap manufacturth process is designed to produce a mean of 12!] bars of soap per batch. A sample of 11 batches show the following numbers of bars of soap: 1133 1 118 1120 112211191113 1 1241122 1122 1121] 1123 At the 1% level test if the production process meets the standard output of 1213 bars per batch. Use the critical value method