Biology 2244A/B Lecture Notes - Lecture 7: Central Limit Theorem, Sampling Distribution, Statistical Inference
1 Jan 2017
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Inferential statistics: have a sample and we try to say something about the population based on what we have sample that came from it: to infer, must have the right kind of sample, estimate things. Histogram showing mean values and the values at which they occur (cid:494)building(cid:495) a sampling distribution. Get a population to take samples from. Population is of test marks on an 8 question test given to 4 students. Population of test marks: 2, 4, 6, 8. Can be any value depending on sample # Create a frequency distribution for the data: frequency that x bar takes on a particular value, counted how many times that value occurs. The probability distribution of a sample statistic, built from all possible samples of size n: all the values it can take on, distribution of a sample statistic, based on statistics of all samples of a chosen size.
