Show the step-by-step solution Please use these formulas: file:///C:/Users/adpoog/OneDrive/Documents/JHEN/formula.pdf

INSTRUCTION: Using all the given information and/or the data below, compute for the value of the Measures of Dispersion - Population and Sample Variance and Standard Deviation (Grouped Data) Class Frequenc Class Class Relative cf Interval y(f) Mark T Boundar Frequency y 15 - 20 5 17.5 14.5 - 20.5 12.5% 5 40 21 - 26 9 23.5 20.5 -26.5 22.5% 14 35 27 - 32 4 29.5 26.5 - 32.5 10% 18 26 33 - 38 10 35.5 32.5 - 38.5 25% 28 22 39 - 44 4 41.5 38.5 - 44.5 10% 32 12 45-50 8 47.5 44.5 - 50.5 20% 40 8 N = 40 100%