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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

Solutions > Addition/Subtraction Word Problems Calculator >

Dan had 5 apples, he ate 2 apples, how much apples does he have now?

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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

☐²

x^☐

√☐

^□√☐

□□

log_□

π

θ

∞

∫

ddx

≥	≤	·	÷	`x`^◦	(☐)	\|☐\|	(`f` ◦ `g`)	`f`(`x`)	ln	`e`^☐
(☐)^′	∂∂`x`	∫_□^□	lim	∑	sin	cos	tan	cot	csc	sec

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дисперсия 1, 2, 3, 4, 5, 6

Solution

3.5

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Выборочная Дисперсия

Выборочная дисперсия измеряет насколько данные разбросаны по выборке.
Для набора данных x₁, … , x_n (n элементов) со средним значением ̅ x, Var(X)=∑_i=1ⁿ(x_i−̅ x)²n−1

Вычислите среднее, ̅ x: 3.5

Вычислите ∑_i=1ⁿ(x_i−̅ x)²: 17.5

Вычислите количество слагаемых в наборе данных: n=6

Вычислите Var(X)=∑_i=1ⁿ(x_i−̅ x)²n−1 : 3.5

3.5

Addition/Subtraction Word Problems Examples

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