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[DOC File]Sample Test Questions -- Test 1 - University of Florida
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C, in general a slope k implies that a one unit increase in the X variable will give a k unit increase in the Y variable. In this case, for every one unit (ft/s) increase of the boxcar, the number of damaged cans increases by k. C, (42.9/1.895)*(0.522 ) = 11.8
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[DOC File]Cost Effective Ways to Generate Define.PDF & Define ...
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Variable Name The name of the SAS variable. Type The variable type which includes values such as Character or Numeric. Length The variable length. Label The descriptive label of the variable. Format SAS formats used. If it is a user defined format, it would need to be decoded. Origins The document where the variable came from.
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[DOC File]Sampling and Sample Size - Columbia University
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An extra increase in height of 0.5 cm in the milk group would be considered an important difference. How large a study should she do? To have 80% power of detecting this difference (at 5% significance level, two-tailed) she would need, using Lehr’s rule, N = 16 x (2 / 0.5)2 = 256 per group.
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[DOC File]SAS Data Quality – Cleanse: Techniques for Merge/Purge on ...
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We have employed SAS-DQ using df-Customize and algorithms in Base SAS to reduce the time for match code creation and increase the accuracy of fuzzy matching. The SAS-DQ product would be enhanced by the addition of a procedure to join dupe groups, but …
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[DOC File]Use of the Public Use Replicate Weight File
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This is an ASCII file with a record length of 1,456 columns. The following table documents the location of each variable. The weights, PWWGT0 – PWWGT160, are nine digits with four implied decimals. The match keys are H_SEQ and PPPOS -- H_SEQ with length 5 and PPPOS is with length 2. Variable Name Start Column Finish Column
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[DOC File]Lab Objectives - Stanford University
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SAS estimates the baseline hazard and survival functions using a nonparametric maximum likelihood method. Using the estimated coefficients for the covariates (the betas from above), SAS can estimate a survival function for an individual with specific values of the covariates (SAS …
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[DOC File]EXTRACTING CASES WITH A GIVEN STRING FROM SAS
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In this case it is "BACTRIM". Now we create another new variable called "new_drug". New_drug is actually a numeric variable. SAS has a function called INDEX that will return the location number of the first character in the string. The first variable required by INDEX is the variable of interest. In this case that is the variable "drug".
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[DOC File]Lab Objectives - Stanford University
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Note use of proc format to assign format to the variable treat. Recall: in SAS LAB 2 we graphed log(-log)S(t) for these data against log(time) using proc lifetest, which involved fewer steps!! It’s a quick drop-off for this group. Note that the confidence intervals go haywire around PredictedSurvival=0.
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[DOC File]Experimental Design Worksheet
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Independent Variable: type of light Dependent Variable: plant growth. Control Group: white light group, closet group Experimental Group: colored light groups. Constants (controlled variables): fertilizer, size of pot, species of fern, amount of water, length of growth time, temperature, distance of light, etc.
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[DOC File]A Cox Regression Model with Time Dependent Explanatory ...
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Hazard ratios compare the probability of the event occurring within a given time interval for an individual belonging to one group versus another (e.g., females versus males) or for an increase in one unit of a continuous predictor variable. The models included the length of each fish at the time of tagging as a measure of body size, sex, and ...
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Increase variable length sas