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Re: st: ttest error message
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: ttest error message
Date
Sat, 16 Mar 2013 08:23:57 +0000
Also check for missings on -Return-. If one decile is in fact all
missing, -ttest- can't perform.
Nick
On 15 Mar 2013, at 19:47, Xixi Lin <[email protected]> wrote:
Hi,
I am using the following ttest code; however it shows the error
message:1 group found, 2 required-----what does it mean?
Here is my code:
foreach x in x1 x2 x3 x4 x5 {
foreach z of numlist 2/120 {
foreach j of numlist 10 15 20 25 30 35 40 45 50 55 {
qui ttest Return if inlist(group_`x',1,10) & Period==`z' &
Sector==`j', by(group_`x') unequal
display "`x'" "Period " "`z'" "Sector " "`j'" `r(p_l)'
`r(p)' `r(p_u)'
}
}
}
Any help is appreciated!
Thanks,
Xixi Lin
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