PSY 2012 Lecture Notes - Lecture 6: Statistical Inference, Confidence Interval, Descriptive Statistics
Document Summary
A variable not known to the scientist; can change the outcome of experiments. In a lab, they were testing the visual capabilities of fruit flies. Two different labs were seeing different things happening in the optical nerves, even when the labs were set up the same. One lab was in fluorescent light bulbs, which set of the fruit flies nerve. The second lab didn"t have fluorescent lights, which was why their data differed. Measures of central tendency (mean, median, mode) Gives an idea of a typical score within a data set. This shows how much the data varies--if there"s lots of different stuff, or if everything"s pretty similar. This is a way to apply your science to other people. Statistical significance (p < . 05 or p < . 01) This shows the likelihood that your conclusion is wrong (5%-1%) The is how likely you are to be correct.
