Correlation, linear regression and path analysis of grades on biological sciences courses of UPCA BSA graduates from 1965 to 1969

Date

3-1970

Degree

Bachelor of Science in Agriculture

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Mariano B. de Ramos

Abstract

Low to moderate, significant (at 1 and 5% level) correlation coefficients (0.00411 to 0.51530) were observed from simple correlation analysis of grades in biological courses required for all UPCA BSA under—graduates. Partial correlations of the same courses gave significant moderate correlation coefficients (0.29795 to 0.73205), slightly higher than simple correlation coefficients. Moreover, partial correlation showed significant results between grades in biological courses correlated to the average grade from these courses, as well as to the general average grade, whereas simple correlation did not show similar results. Furthermore, simple correlation coefficients were numerically equal to the partial correlation coefficients except in the correlation of Botany 1 and Botany 30 with the grades in each biological course, where partial correlation were greater than simple correlation coefficients. Highly significant multiple correlation coefficients (R) were obtained from the correlations of — the grades in Plant Pathology 11 to the grades in prerequisite plant science courses (R = 0.58732); the grades in Animal Husbandry 1 to the grades in basic animal science courses (R = 0.63946); the general average grade to the grades from courses considered (R = a 0.77297); the grades in biological courses with its average(R=0.95983). Regression analysis showed some insignificant, low regression coefficients. Predicting equations and the corresponding efficiency of pre-diction showed that grades in Botany 1 were inefficient predictors of grades in higher plant science courses which corresponded to Entomology 1 in higher animal science courses. Moreover, grades in each course were good predictors of the average grade in biological courses except grade in Botany 50. However, out of the thirteen (13) predictors of the general average grade in all academic courses, grades in Poultry Husbandry 1 showed considerable regression but grade in Botany', Agronomy 10 and Zoology 1 showed negative regression coefficients. Patterns of relationships traced by the path coefficients depicted causality of variations among prerequisite or basic courses in relation to higher subjects. Among plant science courses, grades in Botany 30 and Agronomy 5 have a great say on the grades in higher plant science courses. Slight variations of grades in Animal Husbandry 1 were exhibited by low path coefficients (0.171655352 to 0.20685706) of grades from Microbiology 10, Zoology 1 and Poultry Husbandry 1. Low path coefficients of biological courses in relation to the general average grade showed that grade-variations from a course were slightly reflected on the general average grade. A uniform trend of values was exhibited by simple and multiple correlation coefficients whereas partial correlation multiple regression and path coefficients showed otherwise.

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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