某企業(yè)準備用3種方法組裝一種新的產品,為確定哪種方法每小時生產的產品數(shù)量最多,隨機抽取了30名工人,并指定每個人使用其中的一種方法。通過對每個工人生產的產品數(shù)進行方差分析得到下面的結果:
若顯著性水平α=0.05,檢驗三種方法組裝的產品數(shù)量之間是否有顯著差異?您可能感興趣的試卷
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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 ().
Descriptive statistics deals with methods of()
對某班級學生的生活狀況進行統(tǒng)計調查,下列標志中屬于不變標志的是()
One rule that must always be followed in constructing frequency distributions is that ().
什么是季節(jié)變動?研究它的意義何在?如何測定季節(jié)變動?
常用的長期趨勢測定的方法有哪些?各有什么特點?
時間序列構成因素有哪些?分解的基本原理和思路是什么?
某廠某年職工勞動生產率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()
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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a ().
要了解某地區(qū)全部大學生的就業(yè)情況,那么()