Mathematics, 16.12.2020 17:50 nbug2121
The following are the heat-producing capacities of coal from two mines (in millions of calories per ton): Mine A: 8,500, 8,330, 8,480, 7,960, 8,030 Mine B: 7,710, 7,890, 7,920, 8,270, 7,860. Assuming that the data constitute independent random samples from normal populations with equal variances, construct a 99% confidence interval for the difference between the true average heat-producing capacities of coal from the two mines.
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If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m ā 1) : (2n ā 1).
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The following are the heat-producing capacities of coal from two mines (in millions of calories per...
History, 06.03.2020 23:30
Mathematics, 06.03.2020 23:30