# the words correct and true value refers to the of data

Matching is a technique that is used to evaluate the effect of a treatment (intervention) when those who receive the treatment and those who do not have not been randomly assigned. Ethnographic Decision Models

Time Series Maximum Likelihood Estimation

Because only one sample is generally drawn from a population for a research study, the standard error is calculated by dividing the sample deviation by the number of the observations in the sample.

Endogeneity occurs when the dependent variable may actually be a cause of the independent variable. Accuracy refers to how close a measurement is to the true value of what is being measured.

Discriminant Analysis Since we can estimate the error, we can also estimate the accuracy of a measurement. The number of complete interviews or surveys divided by the number of individuals who were originally asked or selected to be interviewed or complete a survey (all eligible sample selections). Level of Significance If the analyst touches the weight with their finger and obtains a weight of 1.0005 grams, the total error = 1.0005 -1.0000 = 0.0005 grams and the random and systematic errors could be estimated to be 0.0001 and 0.0004 grams respectively. Distortions that occur when some members of a population are systematically excluded from the sample selection process. Now simulate a new set of measurements by dropping pennies from a height of 2 meters.