| $x_i$ | $(x_i - \bar{x})^2$ |
| $3$ | $182.25$ |
| $6$ | $110.25$ |
| $9$ | $56.25$ |
| $12$ | $20.25$ |
| $15$ | $2.25$ |
| $18$ | $2.25$ |
| $21$ | $20.25$ |
| $24$ | $56.25$ |
| $27$ | $110.25$ |
| $30$ | $182.25$ |
Explore More
| $X_i$ | $0$ | $1$ | $2$ | $3$ | $4$ | $5$ |
| $f_i$ | $k+2$ | $2k$ | $k^2-1$ | $k^2-1$ | $k^2-1$ | $k-3$ |
Vedclass Products
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialGenerate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeLive online exams with unlimited students, 360° analytics & white-label branding.
See Demo