b****l 发帖数: 95 | 1 菜鸟一个,问以下统计和数学方面的问题
"Factor A had a negligible effect on the data, accounting for less than 1%
of the variability in the data"
如果把句中的1%换成“2%”或”10%“或”70“会有什么问题吗?
y = exp(4.14 – 1.35 × x)/[1 + exp(4.14 – 1.35 × x)], R2 = 0.97
what is exp standing for in this equations? Is this equations representing a
指数曲线? |
L**********A 发帖数: 7115 | 2 1,2%的variability 一般是negligible的
70% 基本就不会是negligible了
exp 是指数方程,y请参见logistic function
a
【在 b****l 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 菜鸟一个,问以下统计和数学方面的问题 : "Factor A had a negligible effect on the data, accounting for less than 1% : of the variability in the data" : 如果把句中的1%换成“2%”或”10%“或”70“会有什么问题吗? : y = exp(4.14 – 1.35 × x)/[1 + exp(4.14 – 1.35 × x)], R2 = 0.97 : what is exp standing for in this equations? Is this equations representing a : 指数曲线?
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b****l 发帖数: 95 | 3 谢谢楼上的诚心回复。你解释的很明白。既然遇上了专家和热心人,那我就再问一个问
题,“Factor A had a negligible effect on the data, accounting for less than
1% of the variability in the data"中,Factor A对数据的结果影响很小,那么我
们是不是就可以讲,这个A因素对我的研究结果没有什么贡献?我一下步设计试验时,
就可以把这个A因素排除在外,不用考虑它对试验结果的影响?注:在我们领域中,我
们一般关注的是对试验结果有显著影响的试验因素。
【在 L**********A 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 1,2%的variability 一般是negligible的 : 70% 基本就不会是negligible了 : exp 是指数方程,y请参见logistic function : : a
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P****D 发帖数: 11146 | 4 Strictly speaking, that depends on what kind of "experiment" you are trying
to designing. Assuming it's a randomized trial, generally you don't need to
control for that factor.
And do not conclude "factor A has no contribution to my outcome of interest"
yet.
【在 b****l 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 谢谢楼上的诚心回复。你解释的很明白。既然遇上了专家和热心人,那我就再问一个问 : 题,“Factor A had a negligible effect on the data, accounting for less than : 1% of the variability in the data"中,Factor A对数据的结果影响很小,那么我 : 们是不是就可以讲,这个A因素对我的研究结果没有什么贡献?我一下步设计试验时, : 就可以把这个A因素排除在外,不用考虑它对试验结果的影响?注:在我们领域中,我 : 们一般关注的是对试验结果有显著影响的试验因素。
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b****l 发帖数: 95 | 5 谢谢你的解答。我是在读专业英文文献时看到这么一句话,因我对统计不是特别懂,所
以不知道如何理解这句话在上下文的作用?这个因素A到底对试验结果有何作用?还有
,因素A对这个VARIABILITY贡献大或小,有什么区别,说明什么问题?
trying
to
interest"
【在 P****D 的大作中提到】![](/moin_static193/solenoid/img/up.png) : Strictly speaking, that depends on what kind of "experiment" you are trying : to designing. Assuming it's a randomized trial, generally you don't need to : control for that factor. : And do not conclude "factor A has no contribution to my outcome of interest" : yet.
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b****l 发帖数: 95 | 6 谢谢你的解答。我是在读专业英文文献时看到这么一句话,因我对统计不是特别懂,所
以不知道如何理解这句话在上下文的作用?这个因素A到底对试验结果有何作用?还有
,因素A对这个VARIABILITY贡献大或小,有什么区别,说明什么问题?
trying
to
interest"
【在 P****D 的大作中提到】![](/moin_static193/solenoid/img/up.png) : Strictly speaking, that depends on what kind of "experiment" you are trying : to designing. Assuming it's a randomized trial, generally you don't need to : control for that factor. : And do not conclude "factor A has no contribution to my outcome of interest" : yet.
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