How do I get the SEM or SD of the ratios# Biology - 生物学
y*p
1 楼
注册了lowes 周六的build and grow 活动。不知道好不好玩。
大家有人去过吗？
大家有人去过吗？
h*d
2 楼
http://www.amazon.com/Nintendo-3DS-Cosmo-Black/product-reviews/
1.0 out of 5 stars wrong item, March 29, 2011
By
A Dinosaur-Shaped Car "Homosexual Porn" - See all my reviews
Fun:1.0 out of 5 stars
This review is from: Nintendo 3DS - Aqua Blue (Video Game)
Seller mailed me a Virtual Boy painted blue, with the legs torn off, instead
of the item described. Included a handwritten note that said "basically the
same thing".
1.0 out of 5 stars wrong item, March 29, 2011
By
A Dinosaur-Shaped Car "Homosexual Porn" - See all my reviews
Fun:1.0 out of 5 stars
This review is from: Nintendo 3DS - Aqua Blue (Video Game)
Seller mailed me a Virtual Boy painted blue, with the legs torn off, instead
of the item described. Included a handwritten note that said "basically the
same thing".
h*g
3 楼
I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
34,40. I want to calculate the ratio (group two/group one). I will take the
means of the two groups and calculate the ratio. How do I get the SEM or SD
of the ratios? Thanks.
34,40. I want to calculate the ratio (group two/group one). I will take the
means of the two groups and calculate the ratio. How do I get the SEM or SD
of the ratios? Thanks.
x*i
4 楼
好玩
我家娃去了一年多了，攒了无数的badge，家里到处都是他自己做的玩具
home depot也有手工，每月一次，主题以实用为主，培养能力但不太好玩
【在 y*****p 的大作中提到】
: 注册了lowes 周六的build and grow 活动。不知道好不好玩。
: 大家有人去过吗？
我家娃去了一年多了，攒了无数的badge，家里到处都是他自己做的玩具
home depot也有手工，每月一次，主题以实用为主，培养能力但不太好玩
【在 y*****p 的大作中提到】
: 注册了lowes 周六的build and grow 活动。不知道好不好玩。
: 大家有人去过吗？
Z*l
5 楼
這個會有很多人看不懂的
instead
the
【在 h*d 的大作中提到】
: http://www.amazon.com/Nintendo-3DS-Cosmo-Black/product-reviews/
: 1.0 out of 5 stars wrong item, March 29, 2011
: By
: A Dinosaur-Shaped Car "Homosexual Porn" - See all my reviews
: Fun:1.0 out of 5 stars
: This review is from: Nintendo 3DS - Aqua Blue (Video Game)
: Seller mailed me a Virtual Boy painted blue, with the legs torn off, instead
: of the item described. Included a handwritten note that said "basically the
: same thing".
instead
the
【在 h*d 的大作中提到】
: http://www.amazon.com/Nintendo-3DS-Cosmo-Black/product-reviews/
: 1.0 out of 5 stars wrong item, March 29, 2011
: By
: A Dinosaur-Shaped Car "Homosexual Porn" - See all my reviews
: Fun:1.0 out of 5 stars
: This review is from: Nintendo 3DS - Aqua Blue (Video Game)
: Seller mailed me a Virtual Boy painted blue, with the legs torn off, instead
: of the item described. Included a handwritten note that said "basically the
: same thing".
s*s
6 楼
你那两组是啥东西，不说具体，没人知道你想干啥。
如果只是误差的传递的话， 定义f(x) = （误差(x)/mean(x)) ^2
z ＝ x/y , f(z) = f(x) + f(y)
56,
the
SD
【在 h*********g 的大作中提到】
: I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
: 34,40. I want to calculate the ratio (group two/group one). I will take the
: means of the two groups and calculate the ratio. How do I get the SEM or SD
: of the ratios? Thanks.
如果只是误差的传递的话， 定义f(x) = （误差(x)/mean(x)) ^2
z ＝ x/y , f(z) = f(x) + f(y)
56,
the
SD
【在 h*********g 的大作中提到】
: I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
: 34,40. I want to calculate the ratio (group two/group one). I will take the
: means of the two groups and calculate the ratio. How do I get the SEM or SD
: of the ratios? Thanks.
m*i
7 楼
好玩
我家娃去了一年多了，家里到处都是他自己做的trucks and wood toys.
【在 x*****i 的大作中提到】
: 好玩
: 我家娃去了一年多了，攒了无数的badge，家里到处都是他自己做的玩具
: home depot也有手工，每月一次，主题以实用为主，培养能力但不太好玩
我家娃去了一年多了，家里到处都是他自己做的trucks and wood toys.
【在 x*****i 的大作中提到】
: 好玩
: 我家娃去了一年多了，攒了无数的badge，家里到处都是他自己做的玩具
: home depot也有手工，每月一次，主题以实用为主，培养能力但不太好玩
h*g
8 楼
I only want to get the ratio of group2 to group1. But I need to present the
data as ratio +or- SD(orSEM). I cannot give a single ratio without SD or SEM
. What I mean is that I get an average of group 1 and average of group2,
then get the ratio. But how do I calculate the SD or SEM of the ratio?
Thanks.
【在 s******s 的大作中提到】
: 你那两组是啥东西，不说具体，没人知道你想干啥。
: 如果只是误差的传递的话， 定义f(x) = （误差(x)/mean(x)) ^2
: z ＝ x/y , f(z) = f(x) + f(y)
:
: 56,
: the
: SD
data as ratio +or- SD(orSEM). I cannot give a single ratio without SD or SEM
. What I mean is that I get an average of group 1 and average of group2,
then get the ratio. But how do I calculate the SD or SEM of the ratio?
Thanks.
【在 s******s 的大作中提到】
: 你那两组是啥东西，不说具体，没人知道你想干啥。
: 如果只是误差的传递的话， 定义f(x) = （误差(x)/mean(x)) ^2
: z ＝ x/y , f(z) = f(x) + f(y)
:
: 56,
: the
: SD
d*s
9 楼
多大开始去的？
★ 发自iPhone App: ChineseWeb - 中文网站浏览器
【在 m*****i 的大作中提到】
: 好玩
: 我家娃去了一年多了，家里到处都是他自己做的trucks and wood toys.
★ 发自iPhone App: ChineseWeb - 中文网站浏览器
【在 m*****i 的大作中提到】
: 好玩
: 我家娃去了一年多了，家里到处都是他自己做的trucks and wood toys.
s*s
10 楼
这样说把，理论上，你测量的每组数据是应该一样的么？（比如对同一样品的测量），
如果是，那么估计你关心的是误差，就按照我前面的公式。如果每组都是random
variable，那是没有公式的
the
SEM
【在 h*********g 的大作中提到】
: I only want to get the ratio of group2 to group1. But I need to present the
: data as ratio +or- SD(orSEM). I cannot give a single ratio without SD or SEM
: . What I mean is that I get an average of group 1 and average of group2,
: then get the ratio. But how do I calculate the SD or SEM of the ratio?
: Thanks.
如果是，那么估计你关心的是误差，就按照我前面的公式。如果每组都是random
variable，那是没有公式的
the
SEM
【在 h*********g 的大作中提到】
: I only want to get the ratio of group2 to group1. But I need to present the
: data as ratio +or- SD(orSEM). I cannot give a single ratio without SD or SEM
: . What I mean is that I get an average of group 1 and average of group2,
: then get the ratio. But how do I calculate the SD or SEM of the ratio?
: Thanks.
D*R
11 楼
最近几次好像都不太好玩啊，我娃喜欢车子啥的。
不过小家伙很enjoy，敲敲打打越来越熟练了。
我自己也很喜欢。
不过小家伙很enjoy，敲敲打打越来越熟练了。
我自己也很喜欢。
m*D
12 楼
哈哈，这是生物里统计没好好学的人的方法：
先把group 1的平均数搞好，再那group 2的每个数字除group 1的平均数，得到一组倍
数。然后在算SD/SEM.
56,
the
SD
【在 h*********g 的大作中提到】
: I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
: 34,40. I want to calculate the ratio (group two/group one). I will take the
: means of the two groups and calculate the ratio. How do I get the SEM or SD
: of the ratios? Thanks.
先把group 1的平均数搞好，再那group 2的每个数字除group 1的平均数，得到一组倍
数。然后在算SD/SEM.
56,
the
SD
【在 h*********g 的大作中提到】
: I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
: 34,40. I want to calculate the ratio (group two/group one). I will take the
: means of the two groups and calculate the ratio. How do I get the SEM or SD
: of the ratios? Thanks.
y*p
13 楼
多少钱买自己做的玩具？
【在 x*****i 的大作中提到】
: 好玩
: 我家娃去了一年多了，攒了无数的badge，家里到处都是他自己做的玩具
: home depot也有手工，每月一次，主题以实用为主，培养能力但不太好玩
【在 x*****i 的大作中提到】
: 好玩
: 我家娃去了一年多了，攒了无数的badge，家里到处都是他自己做的玩具
: home depot也有手工，每月一次，主题以实用为主，培养能力但不太好玩
d*r
14 楼
Let's assume the mean and std of group one are A and a, respective.
Accordingly, the mean and std of group two are B and b, respectively. The
mean of group one divided by group two equals A/B, whereas the std of the
ratio equals (A/B)*[(a/A)^2+(b/B)^2]^0.5.
56,
the
SD
【在 h*********g 的大作中提到】
: I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
: 34,40. I want to calculate the ratio (group two/group one). I will take the
: means of the two groups and calculate the ratio. How do I get the SEM or SD
: of the ratios? Thanks.
Accordingly, the mean and std of group two are B and b, respectively. The
mean of group one divided by group two equals A/B, whereas the std of the
ratio equals (A/B)*[(a/A)^2+(b/B)^2]^0.5.
56,
the
SD
【在 h*********g 的大作中提到】
: I have 2 groups of data, e.g. group one is 1,2,1,3,4, group two is 45,46,56,
: 34,40. I want to calculate the ratio (group two/group one). I will take the
: means of the two groups and calculate the ratio. How do I get the SEM or SD
: of the ratios? Thanks.
d*g
15 楼
it's free
【在 y*****p 的大作中提到】
: 多少钱买自己做的玩具？
【在 y*****p 的大作中提到】
: 多少钱买自己做的玩具？
o*y
16 楼
我们从4岁左右开始去，有一年多了，一开始指导着做，现在很多时候可以自己看着图
做。练习动手能力挺好的
做。练习动手能力挺好的
相关阅读
求审稿，遗传进化方向有人对erik jorgensen 了解吗？The total cell number of a mouse新人career development求建议 (转载)Part-time opportunities for paper editing/translationpaper helplysis buffer里加点什么能让tissue在homogenization瞬间蛋白酶就变性了？谢晓亮告诉习近平自己要全职回国 (转载)有人对 yishi jin , erik jorgensen ,Chisholm, A. D , shen kang 了解吗？ 本人想去美国读博士后， 请前辈们给个建议哈！请教大侠一个细胞培养的问题化学和生物千老为什么四十岁就失业，自救措施有人用 Mouse Embryonic Fibroblast (CF-1)做过 stable transfection 吗？博士后面试问题求教版内大牛GAPDH的Ct值在30以上，这结果还可靠不？One paper help!Thanks!该有的没有，不该有的却有了Paper help on Epigenomics说说自己的老板求助基于Invitrogen pLenti载体的Tet-One系统两年零两个月！