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Ascertainment Bias
A possible form of the bias, mainly in retrospective studies, which arises from a relationship amongst the exposure to the risk factor and the probability of detecting the event of interest. In a study comparing women by means of cervical cancer and a control group, for instance, an excess of oral contraceptive use among the cases might possibly be due to more regular screening for disease prevailing among the women are known to be taking the pill.
To study what fraction of houses for sale in Victoria has a finished basement, a researcher selected a random sample of 20 houses that were on the market. It was found that 11 of t
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why should cofficient of variation be used to compare the dispersion?
The square of the sample correlation coefficient is typically denoted r2 and called the coefficient of determination. It estimates the fraction of the variance in Y that is explain
1. Suppose that there is a Beta(2,2) prior distribution on the probability µ that a coin will yield a "head" when spun in a speci?ed manner. The coin is independently spun 10 times
what is the difference between HISTORIGRAMS and HISTOGRAMS?
Employer's FICA tax rate for 2012 The employer's FICA tax amount for 2012 involves 1) the Public Protection tax amount of 6.2% of each individual's first $110,100 of income, inc
Soddy and Rutherford, from their experimental study regarding the radioactive disintegration formulated the following laws, known as laws of radioactive disintegration. 1. Radioac
Use your data to perform the following tasks. 1. Based on the variables, construct a design that consists only main effects of one categorical IV and at least two continuous DV
List all possible simple random samples of size n = 2 that can be selected from the population {0, 1, 2, 3, 4}. Calculate 2 s for the population and Var y( ) for the sample.
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