I have just one more question.
LCLM= mean - 1.96*std_dev/(N)^0.5?
UCLM =mean - 1.96*std_dev/(N)^0.5?
If so, why do I have an output like this?
UCLM = 2.62644 ?
It shouldn't be:
LCLM= 2.57046-(1.96*0.11615)/(19^0.5) = 2.518233
UCLM = 2.57046+(1.96*0.11615)/(19^0.5) = 2.622687 ????
On 14 Jul, 10:55, Nanita <susana.urb...@gmail.com> wrote:
> Hi all,
> I have this code to calculate the confidence bands of set of data.
> proc means data =sort_ic
> var V_ASK V_BID V_MID;
> by codigo_param prazo;
> id codigo_param prazo;
> output out=sort_ic_source
> / autoname autolabel inherit
> My question is... what is the destribuition used? Normal(0,1)??
> Thanks in advance