Datrys 1/10left(left(9-8.3right)^2*2+left(8-8.3right)^2*6+left(10-8.3right)^2+left(7-8.3right)^2right)

$$\frac{ 1 }{ 10 } \left( { \left(9-8.3 \right) }^{ 2 } \times 2+ { \left(8-8.3 \right) }^{ 2 } \times 6+ { \left(10-8.3 \right) }^{ 2 } + { \left(7-8.3 \right) }^{ 2 } \right)$$

Enrhifo

$$0.61$$

Camau Ateb

Tynnu 8.3 o 9 i gael 0.7.

$$\frac{1}{10}\left(0.7^{2}\times 2+\left(8-8.3\right)^{2}\times 6+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Cyfrifo 0.7 i bŵer 2 a chael 0.49.

$$\frac{1}{10}\left(0.49\times 2+\left(8-8.3\right)^{2}\times 6+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Lluosi 0.49 a 2 i gael 0.98.

$$\frac{1}{10}\left(0.98+\left(8-8.3\right)^{2}\times 6+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Tynnu 8.3 o 8 i gael -0.3.

$$\frac{1}{10}\left(0.98+\left(-0.3\right)^{2}\times 6+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Cyfrifo -0.3 i bŵer 2 a chael 0.09.

$$\frac{1}{10}\left(0.98+0.09\times 6+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Lluosi 0.09 a 6 i gael 0.54.

$$\frac{1}{10}\left(0.98+0.54+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Adio 0.98 a 0.54 i gael 1.52.

$$\frac{1}{10}\left(1.52+\left(10-8.3\right)^{2}+\left(7-8.3\right)^{2}\right)$$

Tynnu 8.3 o 10 i gael 1.7.

$$\frac{1}{10}\left(1.52+1.7^{2}+\left(7-8.3\right)^{2}\right)$$

Cyfrifo 1.7 i bŵer 2 a chael 2.89.

$$\frac{1}{10}\left(1.52+2.89+\left(7-8.3\right)^{2}\right)$$

Adio 1.52 a 2.89 i gael 4.41.

$$\frac{1}{10}\left(4.41+\left(7-8.3\right)^{2}\right)$$

Tynnu 8.3 o 7 i gael -1.3.

$$\frac{1}{10}\left(4.41+\left(-1.3\right)^{2}\right)$$

Cyfrifo -1.3 i bŵer 2 a chael 1.69.

$$\frac{1}{10}\left(4.41+1.69\right)$$

Adio 4.41 a 1.69 i gael 6.1.

$$\frac{1}{10}\times 6.1$$

Lluosi \frac{1}{10} a 6.1 i gael \frac{61}{100}.

$$\frac{61}{100}$$

Ffactor

$$\frac{61}{2 ^ {2} \cdot 5 ^ {2}} = 0.61$$