By Der, Geoff; Everitt, Brian S
Advent to SAS advent person Interface SAS Language interpreting Data-The info Step editing SAS information Proc Step international Statements SAS portraits ODS-The Output supply process improving Output a few suggestions for combating and Correcting blunders info Description and easy Inference: Mortality and Water Hardness within the uk advent tools of research research utilizing SAS basic Inference for Categorical information: From Sandflies to natural Particulates within the Air creation equipment of research research utilizing SAS research of Variance I: Treating Hypert. Read more...
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Extra info for A Handbook of Statistical Analyses using SAS, Third Edition
2008 11:21pm Compositor Name: VBalamugundan Data Description and Simple Inference & 47 Uncorrected SS: Uncorrected sum of squares; simply the sum of squares of the observations. Corrected SS: Corrected sum of squares; simply the sum of squares of deviations of the observations from the sample mean. Coeff variation: Coefficient of variation; the standard deviation divided by the mean and multiplied by 100. Std Error Mean: The standard deviation divided by the square root of the number of observations.
If the format list has fewer informats than the number of variables in the variable list, the whole format list is re-used. ); This feature is useful where the data contain repeating groups. If the answers to the 20 questions occupied 1 and 2 columns alternately, they could be read with input (q1-q20) (1. ); The different forms of input may be mixed on the same input statement for maximum flexibility. 4 & 17 Multiple Lines per Observation Where the data for an observation occupy several lines, the slash character (=), used as part of the input statement, indicates where to start reading data from the next line.
Say we want to calculate the mean of five variables, x1-x5. An assignment of the form xmean ¼ (x1 þ x2 þ x3 þ x4 þ x5)=5; will result in a missing value if any of x1-x5 are missing. On the other hand, using the mean function, as in xmean ¼ mean(x1,x2,x3,x4,x5); will result in a missing value only if all of them are missing. To assign a value to a character variable, the text string must be enclosed in quotes, for example, team ¼ 'green'; A missing value may be assigned to a character variable as follows: team ¼ ' '; To modify the value of a variable for some observations and not others, or to make different modifications for different groups of observations, the assignment statement may be used within an if then statement.