填空题登记性误差从理论上讲是可以()的,而()误差通常是无法消除的,但事 先可以进行控制或计算。

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品合格率指标是()

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If the individual class frequency is divided by the total frequency, the result is the ().

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Which of the following is best to show the percentage of a total budget that is spent on each category of items?()

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If data are grouped into intervals and the number of items in each group is listed, this could be called a ()

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企业生产一种产品需顺次经过四个车间,这四个车间的废品率分别为1.5%、2.0%、2.0%和1.0%。该企业生产这种产品的平均废品率是多少?

题型:问答题

Which of the following statements is not true?()

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在组距数列中,下限就是()

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Claudia Taylor, Director of Global Industrial Sales in Melbourne, is concerned by a deteriorating sales trend. Specifically, the number of customers is stable at 1500 but they are purchasing less each year. She orders her staff to search for causes of the downward trend by selecting a focus group of 40 industrial customers. For this study, the set of 40 industrial customers is a ().

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A politician who is running for the office of premier in a state with 3 million registered voters commissions a survey. In the survey, 53.6% of the 5000 registered voters interviewed say they plan to vote for him. The population of interest is the()

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The number of class intervals in a frequency distribution is usually between ().

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