問答題
某汽車生產(chǎn)商欲了解廣告費(fèi)用X對銷售量Y的影響，收集了過去12年的有關(guān)數(shù)據(jù)。通過計(jì)算得到下面的有關(guān)結(jié)果：
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A cumulative frequency distribution would provide（）.
題型：單項(xiàng)選擇題
什么是季節(jié)變動(dòng)？研究它的意義何在？如何測定季節(jié)變動(dòng)？
題型：問答題
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
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One advantage of a stem and leaf plot over a frequency distribution is that （）.
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A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.
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