弗萊兄弟暖氣空調(diào)公司,雇傭了Larry Clark 和George Murnen 兩位員工從事客服工作,公司經(jīng)理Tom Fry對(duì)他們每日接到的電話進(jìn)行了統(tǒng)計(jì)。對(duì)α=0.05,檢驗(yàn)平均接到的電話數(shù)是否有差異。
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A summary measure that is computed from a sample to describe a characteristic of the population is called()
如果居民按報(bào)告期價(jià)格購(gòu)買商品需多支出40萬(wàn)元,報(bào)告期商品銷售額為200萬(wàn)元,則價(jià)格指數(shù)為()
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). The average number of absences per employee, calculated from the personnel data of all employees, is a ().
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 ().
某企業(yè)2018年技術(shù)工占50%,2019年新招收了一批學(xué)徒工,使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無(wú)變化,則2019年職工總平均工資將()
最能反映離散程度的指標(biāo)是()
If the individual class frequency is divided by the total frequency, the result is the ().
要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()