Homework Set #3/97
95% Confidence Interval 15000 ± 1.96 * 2000 / (400 = [14804, 15196] 99% Confidence Interval 15000 ± 2.575 * 2000 / (400 = [14742.5, 15257.5] [2] (b) The Mayor, in a hurry to present some statistics in a speech she is scheduled to give, uses the mean of $15,000 as her estimate of the mean annual income of employed persons residing in the city. ................
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