單項選擇題The sum of the deviations may be 0.00.To get around this problem,we use the()of the deviations

A.square
B.absolute value
C.minimum
D.maximum


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1.單項選擇題deviation is the distance between a()and the().()

A.median;mean
B.data point;mean
C.quartile;median
D.data point;median

3.單項選擇題The purpose of statistical inference is to provide information about the()

A.sample based upon information contained in the population
B.population based upon information contained in the sample
C.population based upon information contained in the population
D.mean of the sample based upon the mean of the population

4.單項選擇題If A and B are independent events,then()

A.P(A) must be equal to P(B)
B.P(A) must be greater thanP(B)
C.P(A) must be less than P(B)
D.P(A) must be equal to P(A│B)