看lz不是stats出身啊。。。这句话是对的 P value is the probability of getting the results if the null hypothesis is true.
p value怎么来的呢，是你先假设h0，然后你就可以有一个理论上的distribution，根据这个distribution，继续推导你的sample的p
但是你导师的问题里 null hypothesis是啥？有时候是=有时候是≥或者≤ 你导师的那个问题要结合你的statistics具体分析啊 你的回答一上来就是no difference，好像也不大对题
[本文发送自华新手机Wap版]
[phoebee (9-3 19:58, Long ago)]
[ 传统版 |
sForum ][登录后回复]21楼
(引用 phoebee:看lz不是stats出身啊。。。这句话是对的 P value is the probability of getting the results if the null hypothesis is true.
p valu...)我当然不是啊最多半路出家
我到现在还搞不明白为什么导师那个问题是对的
今天又问了几个医生
人家都觉得我导师那问题不对或者本身就有问题
现在的我更晕了
泪奔。。
[本文发送自华新iOS APP]
[小猪123 (9-3 20:11, Long ago)]
[ 传统版 |
sForum ][登录后回复]22楼
(引用 小猪123:这位兄台可以rephrase一下你的正确描述吗？ 不明白啊 泪奔。。)抱歉如果你刚刚接触statistics,你可以认为你导师这样说是对的。以后会慢慢理解的。 [本文发送自华新手机Wap版] [走走停停看看 (9-3 20:22, Long ago)] [ 传统版 | sForum ][登录后回复]23楼
大家都很热心啊不过有些回复里有对有错。这下楼主要更乱了。 [mantissa (9-3 22:50, Long ago)] [ 传统版 | sForum ][登录后回复]24楼
既然初始表述就是有问题的，那判断有问题的表述的T or F，意义不大了吧。[TPMT (9-3 23:39, Long ago)] [ 传统版 | sForum ][登录后回复]25楼
(引用 笑天:看来看去怎么像是理解上的问题 英文或者提议问题的核心是什么，P的意义呢， 问题是怎么问的 某命题成立，误差在P=0.01的水平 意思是命题�...)你的表述把P和alpha (Type I error)搞混了~[TPMT (9-3 23:54, Long ago)] [ 传统版 | sForum ][登录后回复]26楼
随手一查P越小，reject的可能性越大，一句话就解释了。不可能0.01p反而才1%的可能 not true
The level of statistical significance is often expressed as a p-value between 0 and 1. The smaller the p-value, the stronger the evidence that you should reject the null hypothesis.
A p-value less than 0.05 (typically ≤ 0.05) is statistically significant. It indicates strong evidence against the null hypothesis, as there is less than a 5% probability the null is correct (and the results are random). Therefore, we reject the null hypothesis, and accept the alternative hypothesis.
However, this does not mean that there is a 95% probability that the research hypothesis is true. The p-value is conditional upon the null hypothesis being true is unrelated to the truth or falsity of the research hypothesis.
A p-value higher than 0.05 (> 0.05) is not statistically significant and indicates strong evidence for the null hypothesis. This means we retain the null hypothesis and reject the alternative hypothesis. You should note that you cannot accept the null hypothesis, we can only reject the null or fail to reject it.
[本文发送自华新手机Wap版]
[Seabass (9-4 0:22, Long ago)]
[ 传统版 |
sForum ][登录后回复]27楼