Authorities there must buy new equipment." The U.N.agency reports mortality rates in Gaza are about 30 percent higher than among the Palestinian population in the West Bank.

VOA: standard.2010.06.01

They divide by n-1 to make it an unbiased estimator of the population variance, but I'm just going to show it in a simple way here.

当除以n-1表示的是对总体的,无偏估计,我在这里只是说的简单一点

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"These targets are set for 2015 and are to achieve at least 90 percent measles vaccination coverage nationally and 80 percent coverage in every district, reduce measles cases to less than five per million population, reduce measles mortality by U.N.health agencies have made huge strides in reducing the number of children dying from measles.

VOA: standard.2010.05.21

He later joined the U.N. population agency and brought in Laquian.

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The U.N. estimates the Rohingya population in Myanmar at 800, 000 people.

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We do not yet have an accurate count of the many casualties, both among U.N. staff and the local population.

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