PSYC-2101 Chapter Notes - Chapter 3: Percentile Rank, Cumulative Frequency Analysis, Frequency Distribution
30 Jul 2013
School
Department
Course
Professor
Document Summary
A frequency distribution- presents the score values and their frequency of occurrence. Under these conditions, the individual scores are usually grouped into class intervals and presented as a frequency distribution of grouped scores. The larger the interval used, the greater the ambiguity. Relative frequency distribution- indicates the proportion of the total number of scores that occurs in each interval. To convert a frequency distribution into a relative frequency distribution, the frequency for each interval is divided by the total number of scores. Cumulative frequency distribution- indicates the number of scores that fall below the upper real limit of each interval. The cumulative frequency for each interval is found by adding the frequency of that interval to the frequencies of all the class intervals below it. Cumulative percentage distribution- indicates the percentage of scores that fall below the upper real limit of each interval.
