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STATA 11 for Windows SAMPLE SESSION - Food Security Group ...

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Stata <strong>11</strong> Sample Session Section 1 - Basic functions: Files, Descriptives, Data Trans<strong>for</strong>mations<br />

list in 1 lists first observation<br />

list in -1 lists last observation<br />

list in 2/4 lists observations 2 through 4<br />

list in -3/-2 lists 2 observations starting with the 3 rd<br />

from the last observation.<br />

To limit the listing to a specific criterion use the “if” key<br />

word. Examples are:<br />

list district vil hh mem ca3 if ca3 > 70<br />

list district vil hh mem ca2 ca3 if ca3 < 15 & ca2 < 3<br />

If the variables you want to list are in the order in the file<br />

that you want to see, rather than list each of the names, you<br />

can type the first variable, then a dash (-), then the last<br />

variable in the list, e.g.<br />

list district-ca3 if ca3 < 15 & ca2 < 3<br />

If we want to see the observations with the five lowest<br />

values and five highest values, we would first sort by that<br />

variable and list the first five cases and the last five cases.<br />

For example, if the question is: What is the age of the 5<br />

youngest head of households and what is the age of the 5<br />

oldest head of households?<br />

Stata commands:<br />

sort ca2 ca3<br />

list district vil hh mem ca1 ca2 ca3 in 1/5<br />

gsort -ca2 +ca3<br />

list district vil hh mem ca1 ca2 ca3 in -5/-1<br />

Reminder: after any command built, we will copy the<br />

command into the Do-file Editor window and switch back<br />

to the menu box and run the command.<br />

Apply what you've just learned about descriptive statistics<br />

by doing the following exercise.<br />

Exercise 1.1 Run descriptive statistics on another sample file. Use the<br />

production questionnaire - Table IV, whose data are in file<br />

C-Q4.DTA.<br />

Hints:<br />

a. make C-Q4.DTA your working data file.<br />

b. Use the Summarize command <strong>for</strong> continuous<br />

variables, and tab1 <strong>for</strong> categorical variables.<br />

c. Prod is a categorical variable.<br />

d. Quantities (p1b, p2b, ...) are continuous variables.<br />

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