सामान्य कृषि एवं कोशिका जीवविज्ञान

Statistical tests for comparing group means:

• The Student's t-test is designed to compare the means of exactly two groups.
• Analysis of Variance (ANOVA), introduced by R.A. Fisher, partitions total variation into between-group and within-group components to test whether means of three or more groups differ significantly ($F$-test).
• Correlation measures the degree of linear association between two variables; regression models dependent vs independent variable relationships.
• Therefore, ANOVA is the standard tool for $\ge 3$ groups.