单项选择题

总体率(1-a)可信区间指 A．求得的区间包含总体率的可能性为 (1-a) B．计算样本率抽样误差的大小 C．求得总体率的波动范围 D．估计样本率的大小 E．估计样本含量

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单项选择题头晕目胀耳鸣，面色如醉，渐成口眼歪斜，手足不能运动，脉弦长有力。治宜首选：

单项选择题A private university is considering a plan to offer summer school courses at a special ratebecause summer enrollments have been dropping. Which of the followingis not a relevantconsideration in this decision?

A．If summer enrollments don't increaseenough, total revenues will be lower underthe new pricing system.
B．Professors who aren't normally paid duringthe summer will be needed to teach thecourses.
C．Higher enrollments will increase copyingcharges for course materials.
D．Depreciation will be recorded on theacademic buildings.