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【单选题】
Java 中 main() 方法的返回值是什么 ? ( )A.
String
B.
int
C.
char
D.
void
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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
【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
【判断题】An assumption underlying the use of t -statistic in sample-based estimation is that the population is normally distributed.
A.
正确
B.
错误
【判断题】The difference between the sample statistic and actual value of the population parameter is the confidence level of the estimate.
A.
正确
B.
错误
【判断题】When a statistic calculated from sample data is used to estimate a population parameter, it is called a point estimate.
A.
正确
B.
错误
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