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【多选题】
焊条的选用原则有（ ）。A.
等同性原则
B.
等强度原则
C.
等条件原则
D.
经济性原则
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反馈参考答案：
举一反三
【判断题】A summary measure that is computed from a sample to describe a characteristic of the population is called a statistic.
A.
正确
B.
错误
【单选题】Which of the following is a statistic that can be used to test hypotheses about a single population
A.
F statistic
B.
t statistic
C.
χ 2 statistic
D.
Durbin Watson statistic
【简答题】离合器从动盘安装时,用 ___或___将离合器从动盘定位于飞轮和压盘中心
【判断题】A point estimate consists of a single sample statistic that is used to estimate the true population parameter.
A.
正确
B.
错误
【单选题】To use a z normal statistic in a one-sample hypothesis test of a population mean, we need to know ( )
A.
the population mean.
B.
the population standard deviation.
C.
the degrees of freedom.
D.
the margin of error.
【单选题】Which of the following is a statistic that can be used to test hypotheses about a single population parameter?
A.
F statistic
B.
t statistic
C.
Durbin Watson statistic
D.
【单选题】Which of the following is most likely a population as opposed to a statistic?
A.
the average score of the first five students completing an assignment
B.
the proportion of females registered to vote in a country
C.
the average height of people randomly selected from a database
D.
the proportion of trucks stopped yesterday that were cited for bad brakes
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