PSYCH 100A Lecture Notes - Lecture 1: Television Content Rating Systems, Statistical Parameter, Statistic
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The entire group of individuals is called the population. The individuals selected to participate in the research study is the sample. The results from the samples are generalized to the population. Data are the information we are collecting from all the individuals in the sample. Data set is a collection of data. mu - referencing mean of population of individuals. We don"t have access to every individual in the population. Usually some discrepancy between the statistics calculated based on different samples. Sampling error: the discrepancy, or amount of error, that exists between a sample statistic and the corresponding population parameter. The difference is due to sampling error from random sampling. Compare effects of two types of tv violence. Organize & simplify (use bar graphs for #hits at doll to compare violence ) The sample data show 5-point difference between the two types of tv violences. No difference between the two types - due to chance (sample error)
