[ferret_users] significance of slope

[Nitin Patil <nitinpatil85@xxxxxxxxx>]

Dear Ferret users,

I want to highlight the significance of slope for that I am using t =
slope/sigmab

For sigmab I am referring the ferret list
(http://www.pmel.noaa.gov/maillists/tmap/ferret_users/fu_2009/msg00494.html)

but not able to get, whether I am doing correct? pls suggest.

script:
let june=precip[l=6:480:12,d=2]
let july=precip[l=7:480:12,d=2]
let aug=precip[l=8:480:12,d=2]
let sept=precip[l=9:480:12,d=2]
let jjas=(june+july+aug+sept)/4

let x1=jjas[l=1:40]
let p = t[gt=x1]
let q = x1
go regresst

let trend = slope*160*40 !(160 months for 40 yrs)

let sigmab = ((qvar/pvar-trend*trend)/(x1[t=@sum]-2))^0.5

let trendsig= 2*sigmab

-- 
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Regards,
Nitin Patil