For a given frequency distribution, n = 20 and Σf<sub>i</sub>x<sub>i</sub> = 140, then X̄ = ………………… .
A. 20
B. 14
C. 7
D. 28
Answer:C
For a given frequency distribution, n = 20 and Σf<sub>i</sub>x<sub>i</sub> = 140, then X̄ = ………………… .
A. 20 B. 14 C. 7 D. 28