PSY30100 Lecture Notes - Lecture 2: Percentile, Interpolation, Bar Chart
Document Summary
After collecting data, it must be organised and simplified. Frequency distributions tell us where the highest scores are, where the lowest scores are, and where the scores are centred. Frequency distribution - an organised table showing how many individuals are located in each category of a measurement scale. The distribution also shows how each person is located relative to everyone else. Grouped frequency distribution - all similar data is combined into a single group called a. Grouped frequency distribution is used for continuous variables since there would be too many categories for simple frequency distributions. Class intervals are of equal width and are simple numbers (2, 5, 10, etc) the lower value of each interval is preferably whole and a multiple of interval width. Histogram - a bar centred above each interval representing the scores of that class interval such that the height of the bar corresponds to the frequency of the score in the interval.
