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Randomized encouragement trial is the clinical trials in which the participants are encouraged to change their behaviour in a particular manner (or not, if they are allocated to the control condition) but there is a little expectation on the behalf of the trial investigators that the participants will fully comply with the request or that there will not be the substantial minority who change their behaviour in the desired way without actually being asked (by trial investigators, at least) to do so. An instance includes randomizing expectant mothers (who are cigarette smokers) to receive the advice to cut down on or completely stop smoking during the pregnancy period. Number of the mothers will fail to reduce their smoking habits even though they have received sufficient encouragement to do so. On the other hand, number of them will cut down whether or not they have received the advice suggesting that they should stop smoking. Randomized encouragement to take part in the cancer screening programmes is another example of it. Again, adherence to the offer of screening will be far from the complete, but, on the other hand, there will always be people who will ask for examination in any case
Chapter 7 2. Describe the distribution of sample means (shape, expected value, and standard error) for samples of n =36 selected from a population with a mean of µ = 100 and a sta
Cluster analysis : A set of methods or techniques for constructing a sensible and informative classi?cation of an initially unclassi?ed set of data, using variable values observed
Missing values : The observations missing from the set of data for some of the reason. In longitudinal studies, for instance, they might occur because subjects drop out of the stud
need answers to questions in book advanced and multivariate statistical methods
Indirect standardization is the procedure of adjusting the crude mortality or morbidity rate for one or more variables by making use of a known reference population. It may, for in
Case-control study : The traditional case-control study is the common research design in the epidemiology where the exposures to risk factors for cases (individuals getting the dis
Hurdle Model: The model for count data which postulates two processes, one generating the zeros in the data and one generating positive values. The binomial model decides the bina
Kalman filter : A recursive procedure which gives an estimate of the signal when only the 'noisy signal' can be observed. The estimate is efficiently constructed by putting the exp
Biplots: It is the multivariate analogue of the scatter plots, which estimates the multivariate distribution of the sample in a few dimensions, typically two and superimpose on th
The model which is applicable to the longitudinal data in which the dropout process might give rise to the informative lost values. Specifically if the study protocol specifies the
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