题目内容

组间变异,是各组间差异之和,是因素的各组均值与总均值的离差平方的加权和,组间变异既受随机变异的影响又受可能存在的处理因素的影响,其大小用组间平方和表示,被称为组间离差平方和,也叫组间平方和,用SSB表示。

A. 对
B. 错

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在单因素方差分析中,F值越大,P值就越大,原假设就越被接受,就越认为组间均值不存在显著差异。

A. 对
B. 错

The coach advised me to wear(1). The shoes should be (2).It’s better to(3).Besides, the coach suggested (3)before exercise, and when I finished, I should (4).

● Length of the trip: 1) _____ days.● Sights to see: the Bund, 2) _____, and Tianzifang●Price: 3) _____ yuan● Transport: 4) _____● Accommodation: 5) _____

What are the true statements based on the video you watched.

Alice doesn't think about the holidy much because she's been preparing for exams.
B. The itinerary of places to visit and things to do is fixed.
C. Tom doesn't have enough money to pay for the trip right now.
D. The tour is only for a group of 30 students.
E. The cost of the tour is quite reasonable.
F. All expenses are included in the tour price.

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