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/__ / ____/ / ____/ 18.0
___/ / /___/ / /___/ SE—Standard Edition
Statistics and Data Science Copyright 1985-2023 StataCorp LLC
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Stata license: 10-user network perpetual
Serial number: 1
Licensed to: Stata Developer
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Notes:
1. Stata is running in batch mode.
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3. Maximum number of variables is set to 5,000 but can be increased;
see help set_maxvar.
Running /home/krg/bin/profile.do ...
Compile number 180110
. do lottery.do
. /* NIST/ITL StRD
>
> Univariate Summary Statistics
>
> Difficulty=Lower N=218 Observed
>
> File Name: lottery.dat
>
> Dataset Name: Maryland Pick-3 Lottery
>
> Description: This is an observed/"real world" data set
> consisting of 218 Maryland Pick-3 Lottery values
> from September 3, 1989 to April 14, 1990 (32 weeks).
> One 3-digit random number (from 000 to 999)
> is drawn per day, 7 days per week for most
> weeks, but fewer days per week for some weeks.
> We here use this data to test accuracy
> in summary statistics calculations.
>
> Stat Category: Univariate: Summary Statistics
>
> Reference: None
>
> Data: "Real World"
> 1 Response : y = 3-digit random number
> 0 Predictors
> 218 Observations
>
> Model: Lower Level of Difficulty
> 2 Parameters : mu, sigma
> 1 Response Variable : y
> 0 Predictor Variables
>
> y = mu + e
>
> Certified Values
> Sample Mean ybar: 518.958715596330
> Sample Standard Deviation (denom. = n-1) s: 291.699727470969
> Sample Autocorrelation Coefficient (lag 1) r(1): -0.120948622967393
>
> Number of Observations: 218
> */
.
. clear
.
. scalar N = 218
. scalar mean = 518.958715596330
. scalar sd = 291.699727470969
. scalar rho1 = -0.120948622967393
.
. qui input int y
.
. summarize y
Variable | Obs Mean Std. dev. Min Max
-------------+---------------------------------------------------------
y | 218 518.9587 291.6997 4 999
. assert scalar(N) == r(N)
.
. lrecomp r(mean) mean sqrt(r(Var)) sd
r(mean) 15.2
sqrt(r(Var)) 15.7
.
. gen time = _n
. tsset time
Time variable: time, 1 to 218
Delta: 1 unit
. corrgram y, lag(1)
-1 0 1 -1 0 1
LAG AC PAC Q Prob>Q [Autocorrelation] [Partial autocor]
-------------------------------------------------------------------------------
1 -0.1209 -0.1222 3.2331 0.0722 | |
.
. lrecomp r(ac1) rho1
r(ac1) 15.0
.
end of do-file