PS101 Lecture Notes - Lecture 5: Null Hypothesis, Autonomic Nervous System, Somatic Nervous System
Document Summary
Statistics help us collect, organize and interpret data. Raw scores- tell us nothing unless we know the range of scores. When we know the range we can calculate the normal distribution. Statistics help us understand why we cluster around some average. Most of us are ambiverts- a little bit of extrovert and introvert. Many of our personality characteristics are genetically inherited. Negatively skewed if it points to the left, positive if it points to the right. In a normal distribution curve you have the mean, median and mode. Extreme scores affect the mean, so sometimes the median is better. In a normal distribution the mean, median and mode fall on the same line. Variability- the extent of which people may differ in performance. One way to look at variability is to calculate the range of scores. The greater the range, the greater the variability.
