proportion是比例,第一題問少于30的比例和少于90的比例,看數(shù)據(jù)就知道（90~100那里有7個(gè),占7/200的比例）
第二題,大于等于40分的比例,大于等于70的比例
第三題不懂
第四題少于70大于等于50的比例
這是一道統(tǒng)計(jì)學(xué)的英文數(shù)學(xué)題,因?yàn)槲艺娴目床欢?/h1>
這是一道統(tǒng)計(jì)學(xué)的英文數(shù)學(xué)題,因?yàn)槲艺娴目床欢?br/>Instead of wanting to know what percent of the data falls into a particular class,we often want to
know what percent falls below a certain value.To make this possible,we will compute the
cumulative relative frequency for each class,which is the sum of the relative frequency of that class
and all the classes below it.
Exam Score frequency relative freq.cumulative r.f.
0-
know what percent falls below a certain value.To make this possible,we will compute the
cumulative relative frequency for each class,which is the sum of the relative frequency of that class
and all the classes below it.
Exam Score frequency relative freq.cumulative r.f.
0-
英語人氣：714 ℃時(shí)間：2020-07-10 07:52:55
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