PSY 202 Lecture Notes - Lecture 6: Interquartile Range, Standard Deviation, Central Tendency
Document Summary
Raio: what is the deiniion of the median of a distribuion? value that cuts the distribuion in half. Raio: what is the deiniion of the mean of a distribuion? the mathemaical balance point of a distribuion; average. Why? it accurrately represents the enire populaion, regardless of how spread out the scores may be. If using summaion notaion, what does the number beneath the sigma tell you? start with this score. What does the number atop the sigma tell you? inish with this score. If we sum all the deviaion scores, they sum to equal zero and simply cancel out. For each populaion parameter that you esimate from a sample, you lose one degree of freedom. By what name do we refer to the term n 1 ? degrees of freedom: what is meant by the skewness of a distribuion? it is a measure of symmetry.
