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73. This answer was obtained using MegaStat. Your answer may be slightly different due to rounding. a. Descriptive statistics Count Mean sample variance sample standard deviation confidence interval 80.% lower confidence interval 80.% upper half-width b. interval. 11-Jan 16 328,706.38 21,081,255,802.65 145,193.86 280,044.45 377,368.30 48,661.92 It is possible that $300 000 is the population mean as the value is in the confidence