Displaying 5 results from an estimated 5 matches for "jerrold".
Did you mean:
herrold
2008 May 05
1
proportional test on epicalc library vs. Jerrold H. Zar.
Hi everyone,
I'm working with the Epical library, specicatly using the power test in
proportions. I think this test is not working like in the book:
Biostatistical Analysis (4th Edition): Jerrold H. Zar
In the example 23.25. (I attach this Pic) It's not the same answer.
Using the follow command don't give the same answer.
library(epicalc)
power.for.2p(0.75, 0.50, 50, 45, alpha = 0.05)
with this command the Power = 0.6402. But in the Book we find Power=0.72.
?what it's the co...
2002 Apr 15
1
simple Q: required sample size & usage of power.t.test()
Hi community,
Seems I am too stupid:
I try to calculate with power.t.test() an example from the statistics textbook [Jerrold H. Zar, Biostatistical Analysis, 2nd edition, Prentice Hall, 1984, Chapter 8, Exercise 8.4, (page 120)]:
-------
A sample of size 18 has a mean of 13.55cm and a variance of 6.4512cm^2.
(a) Calculate the 95% confidence interval for the population mean.
(b) How large a sample would have to be taken...
2012 Dec 04
2
403 Forbidden from nginx when unicorn started in debug mode
I am using nginx with unicorn as a reverse proxy.
Has been fantastic, but needed to look through some code
for first time.
Using ruby 1.9.3p194 with rails 3.2.9, development mode with ssl enabled,
I start unicorn with -d
...and it does not get served up by nginx.
Any ideas, or more information needed?
Thanks!
Jet
Below is my unicorn.rb for developent:
# config/unicorn.rb
env =
2009 Mar 30
1
Comparing Points on Two Regression Lines
...These are the x and y values for each lines.
x1<-c(0.5,1.0,2.5,5.0,10.0)
y1<-c(204,407,1195,27404313)
x2<-c(2.5,5.0,10.0,25.0)
y2<-c(440,713,1520,2634)
Suppose we need to compare the two lines at the common value of x=13.
Please see attached the method as described in section 18.3 in Jerrold H. Zar.
With many thanks
Abou
==========================
AbouEl-Makarim Aboueissa, Ph.D.
Assistant Professor of Statistics
Department of Mathematics & Statistics
University of Southern Maine
96 Falmouth Street
P.O. Box 9300
Portland, ME 04104-9300
Tel: (207) 228-8389
Fax: (207) 780...
2009 Apr 01
0
回复： R-help Digest, Vol 73, Issue 32
...1.0,2.5,5.0,10.0)
> y1<-c(204,407,1195,27404313)
> x2<-c(2.5,5.0,10.0,25.0)
> y2<-c(440,713,1520,2634)
>
>
>
> Suppose we need to compare the two lines at the common value of x=13.
>
>
>
> Please see attached the method as described in section 18.3 in Jerrold H.
> Zar.
>
>
>
> With many thanks
>
>
>
> Abou
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ==========================
> AbouEl-Makarim Aboueissa, Ph.D.
> Assistant Professor of Statist...