expected_value_and_variance_properties
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| expected_value_and_variance_properties [2025/09/30 10:36] – [e.gs in R] hkimscil | expected_value_and_variance_properties [2026/03/17 07:06] (current) – hkimscil | ||
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| Line 1: | Line 1: | ||
| - | ====== | + | ====== |
| ^ EXPECT VALUE ^^ | ^ EXPECT VALUE ^^ | ||
| | $E(X)$ | $\sum{X}\cdot P(X=x)$ | | $E(X)$ | $\sum{X}\cdot P(X=x)$ | ||
| Line 207: | Line 207: | ||
| ====== e.gs in R ====== | ====== e.gs in R ====== | ||
| R에서 이를 살펴보면 | R에서 이를 살펴보면 | ||
| + | <tabbox rs01> | ||
| < | < | ||
| # variance theorem 4-1, 4-2 | # variance theorem 4-1, 4-2 | ||
| Line 272: | Line 273: | ||
| </ | </ | ||
| + | <tabbox ro01> | ||
| < | < | ||
| > # variance theorem 4-1, 4-2 | > # variance theorem 4-1, 4-2 | ||
| Line 364: | Line 365: | ||
| [1,] 16 | [1,] 16 | ||
| > | > | ||
| - | </code> | + | > v.111 <- var(x1 + x1 + x1) |
| + | > v.111 | ||
| + | | ||
| + | [1,] 36 | ||
| + | > var(3*x1) | ||
| + | | ||
| + | [1,] 36 | ||
| + | > 3^2*var(x1) | ||
| + | | ||
| + | [1,] 36 | ||
| + | > | ||
| + | </ | ||
| + | </ | ||
expected_value_and_variance_properties.1759228571.txt.gz · Last modified: by hkimscil