Confidence Intervals for the Population Mean

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A problem like this will be on test 4 and possibly on the final exam. These problems are based on #21(a), #24(a), #25(a), #26(a), #27(a), #28(a) on page 375 of Navidi & Monk, "Elementary Statistics", 2nd edition, McGraw-Hill Education 2016. Updated May 29, 2012, Aug. 22, 2013, Nov. 12, 2013, and Sept. 8, 2015.