Formula to find mean for a grouped data is
A. A + \(\frac{\Sigma \hat{f}_{i} \mathrm{~d}_{\mathrm{i}}}{\mathrm{f}_{\mathrm{i}}}\)
B. A + \(\frac{\Sigma \mathrm{f}_{\mathrm{i}} \mathrm{d}_{\mathrm{i}}}{\mathrm{C}}\)
C. A + \(\frac{\Sigma \mathrm{f}_{\mathrm{i}} \mathrm{d}_{\mathrm{i}}}{\Sigma \mathrm{f}_{\mathrm{i}}}\) × C
D. None
Answer:A
Formula to find mean for a grouped data is
A. A + \(\frac{\Sigma \hat{f}_{i} \mathrm{~d}_{\mathrm{i}}}{\mathrm{f}_{\mathrm{i}}}\) B. A + \(\frac{\Sigma \mathrm{f}_{\mathrm{i}} \mathrm{d}_{\mathrm{i}}}{\mathrm{C}}\) C. A + \(\frac{\Sigma \mathrm{f}_{\mathrm{i}} \mathrm{d}_{\mathrm{i}}}{\Sigma \mathrm{f}_{\mathrm{i}}}\) × C D. None