PSY201H1 Lecture Notes - Cumulative Frequency Analysis, Level Of Measurement, Frequency Distribution
Document Summary
Use 5 steps to calculate frequency distribution of scores sorted into intervals. Distinguish among 3 types of frequency distributions (calculation and interpretation) Explain how measures of central tendency change when shape of distribution changes. List and describe all 5 properties that make mean special. E: how do we calculate a frequency distribution using intervals? (i) (ii) (iii) Find the range of scores: range = highest score-lowest score, 93-42 =51. Determine interval width: assume we want ~10 intervals, determine i (interval width, ex. i=51/10=5. 1, round i to same number of decimal places as in raw data. List the limits of each class interval: begin with lowest interval i = range/number of intervals, lowest interval must contain lowest score, lower limit of lowest interval must be evenly divisible by i, ex. Tally up the scores in each interval and enter amount in frequency (f) column: 3 kinds of frequency distributions.
