FREQUENCY DISTRIBUTIONS MEASURES OF CENTRAL TENDENCY 2 PROBABILITY 2 ANALYSIS OF VARIANCE 1 COLLECTION, EDITING, CLASSIFICATION AND TABULATION OF DATA 1 CORRELATION AND REGRESSION 1 CORRELATIONAL TECHNIQUES 1 DISPERSION 1 INDEX NUMBERS 1 RELATIVE STANDING 1 SIGNIFICANCE OG MEAN 1 TIME SERIES 1 VARIABILITY 1