PSY 2106 Chapter Notes - Chapter 2: Frequency Distribution, Bar Chart, Histogram
Document Summary
Frequency distribution: an organized tabulation of the number of individuals located in each category on the scale of measurement. A frequency distribution table should have 10 intervals. Range: the difference between the lowest score and highest score (h-l+1). Grouped frequency distributions: present groups of scores rather than individual values. Class interval: the groups, or intervals, in grouped frequency distributions. Apparent limits: form the upper and lower boundaries of a class interval. Histogram: used when the data consists of numerical scores that has been measured on an interval or ratio scale. A bar is drawn above each score so that the height of the bar corresponds to the frequency. Each bar extends to the real limits of the score, so that adjacent bars touch. Polygon: used when the data consists of numerical scores that has been measured on an interval or ratio scale.
