Sprendimas: cGMIO5 - 1
s^2 =
| ( (x1-x_v)^2+ (x2-x_v)^2+ (x3-x_v)^2) |
| / (n-1) |
|
s^2 =
$$s^{2}$$ = $$\frac{(x1-x_{v})^{2}+(x2-x_{v})^{2}+(x3-x_{v})^{2}}{n-1}$$
| ( (x1-x_v)^2+ (x2-x_v)^2+ (x3-x_v)^2) |
| / (n-1) |
s^2 =
-
+
+
-
+
-
$$s^{2}$$ = $$\frac{x1^{2}}{n-1}-\frac{2\cdot x1\cdot x_{v}}{n-1}+\frac{3\cdot x_{v}^{2}}{n-1}+\frac{x2^{2}}{n-1}-\frac{2\cdot x2\cdot x_{v}}{n-1}+\frac{x3^{2}}{n-1}-\frac{2\cdot x3\cdot x_{v}}{n-1}$$
| x1^2 |
| / (n-1) |
| 2* x1* x_v |
| / (n-1) |
| 3* x_v^2 |
| / (n-1) |
| x2^2 |
| / (n-1) |
| 2* x2* x_v |
| / (n-1) |
| x3^2 |
| / (n-1) |
| 2* x3* x_v |
| / (n-1) |
s = saknis(
-
+
+
-
+
-
)$$s$$ = $$\sqrt {\frac{x1^{2}}{n-1}-\frac{2\cdot x1\cdot x_{v}}{n-1}+\frac{3\cdot x_{v}^{2}}{n-1}+\frac{x2^{2}}{n-1}-\frac{2\cdot x2\cdot x_{v}}{n-1}+\frac{x3^{2}}{n-1}-\frac{2\cdot x3\cdot x_{v}}{n-1}}$$
| x1^2 |
| / (n-1) |
| 2* x1* x_v |
| / (n-1) |
| 3* x_v^2 |
| / (n-1) |
| x2^2 |
| / (n-1) |
| 2* x2* x_v |
| / (n-1) |
| x3^2 |
| / (n-1) |
| 2* x3* x_v |
| / (n-1) |