PSYC 60 Lecture Notes - Lecture 3: Central Tendency, Supreme Headquarters Allied Powers Europe, Bar Chart
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4 (even if there is no number 4 in the score you still write it because it"s between 10 and 3) Rules for grouping scores: group the scores such that you have only about 10 intervals, the interval width should be a simple number, bottom score should be multiple of interval width. Do not just start with the lowest number in the set: all intervals have same width. Psyc 60 lecture 3 (chapter 2 and 3) Psyc 60 lecture 3 (chapter 2 and 3: interval or ratio: histogram or polygon, nominal or ordinal: bar graph. How to describe a frequency distribution: shape, central tendency (chapter 3, variability (chapter 4) Always: m= x/n, x will change, n will not change, adding or removing a score will usually (but not always) change the mean. Weighted mean: example: a biologist measures the lengths of lobsters caught off the coast of. On day 1, the mean score is 5 for 12 animals.
