【单选题】【消耗次数：1】
在课题适用的时空范围内研究对象的全体叫：（ )
①
个体
②
总体
③
样本
④
大样本
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相关题目
【单选题】
表示大样本资料总体均数95%可信区间可用式（ ）
①
均数加/减尾部概率为0.05的t界值同标准误的乘积
②
均数加/减尾部概率为0.01的t界值同标准误的乘积
③
均数加/减1.96倍的标准误
④
均数加/减1.96倍的标准差
【判断题】
随机取样法在理论上最符合概率论原理。当研究者对所研究总体中各类个体的比例不了解，或总体中的个体之间差异程度较小，或样本数目较大等情况下，它是一种很好的取样方法。但是，它有自己的限制要求和局限性：事先把研究对象编号，比较费时费力；如果总体中的个体分散，抽取到的样本的分布也比较分散，给研究带来困难；当样本容量较小时，可能发生偏差，影响样本的代表性( )。
①
正确
②
错误
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---Tony, go to pay for the supper bills. ---Why _________ I? All of you are richer than me!
①
should
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must
③
can
④
shall
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A group of American soldiers were walking along the road in Irap when a bomb was _____, three of whom were killed.
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set about
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which
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As they are retired, the Smiths prefer a house in the country to spend the rest of their life _____ in a large city.
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in this
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to one
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with that
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about it
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After several years of hard work, he ______ pass the entrance exam.
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could
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can
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is able to
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Mr Guo told us at the beginning of this term that he _________ born on July 24, 1973.
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is
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was
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has been
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When I saw the cars crash on the road，a frightened feeling ________ through my mind.
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flashed
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——How did you like Nick’s performance last night ?—— To be honest ,his singing didn’t ________to be much?
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appeal
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refer
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belong
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occur
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________ all over the hills and around the lake are wild flowers of different colors.
①
Grow
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Growing
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Grew
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Like most July days, it was hot. I stepped into __________ tiny ice-cream shop to cool off with _________ chocolate sundae(圣代冰淇淋).
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the; /
②
a; a
③
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④
the; the