PSYA01H3 Lecture Notes - Lecture 2: Average Absolute Deviation, Scatter Plot, Abscissa And Ordinate
Document Summary
Chapter 2. 4 (lecture: two types of statistics: (descriptive and inferential statistics, descriptive statistics: describe the data so that people can understand, people don"t want to use raw numbers to analyse the data. Inferential data: use the data to help us answer questions and make prediction. Researchers often convert these raw numbers to a frequency distribution. Graphically present the raw numbers into a graph commonly a histogram. Easy to quickly convert back to its raw numbers. The issue with frequency distribution is that it takes too much space when presenting the idea to someone. Instead, people use the measure of central tendency (mean, median, mode) and variability to condense the information to two values. Mean is very sensitive it extreme values, so median in used instead and it is always the. Add up all the differences and divide it by the number of numbers there are.
