Errors in Sampling
Expected Value and Standard Error
Expected value and standard error can provide useful information about the data recorded in an experiment.
Using the Normal Curve
The normal curve is used to find the probability that a value falls within a certain standard deviation away from the mean.
The Correction Factor
The expected value is a weighted average of all possible values in a data set.
A Closer Look at the Gallup Poll
The Gallup Poll is an opinion poll that uses probability samples to try to accurately represent the attitudes and beliefs of a population.