Knowee
Questions
Features
Study Tools

Find the standard deviation for the given probability distribution.xp(X)x.P(X)x2.P(X)00.21  10.08  20.08  30.36  40.27

Question

Find the standard deviation for the given probability distribution.xp(X)x.P(X)x2.P(X)00.21  10.08  20.08  30.36  40.27

🧐 Not the exact question you are looking for?Go ask a question

Solution

Para encontrar la desviación estándar de la distribución de probabilidad dada, sigue estos pasos:

  1. Calcular la media (μ): La media se calcula sumando los productos de cada valor de x x y su probabilidad P(X) P(X) .

    μ=(xP(X)) \mu = \sum (x \cdot P(X))

    Sustituyendo los valores:

    μ=(00.21)+(10.08)+(20.08)+(30.36)+(40.27) \mu = (0 \cdot 0.21) + (1 \cdot 0.08) + (2 \cdot 0.08) + (3 \cdot 0.36) + (4 \cdot 0.27)

    μ=0+0.08+0.16+1.08+1.08=2.4 \mu = 0 + 0.08 + 0.16 + 1.08 + 1.08 = 2.4

  2. Calcular la varianza (σ²): La varianza se calcula sumando los productos del cuadrado de la diferencia entre cada valor de x x y la media μ \mu , y su probabilidad P(X) P(X) .

    σ2=((xμ)2P(X)) \sigma^2 = \sum ((x - \mu)^2 \cdot P(X))

    Sustituyendo los valores:

    σ2=((02.4)20.21)+((12.4)20.08)+((22.4)20.08)+((32.4)20.36)+((42.4)20.27) \sigma^2 = ((0 - 2.4)^2 \cdot 0.21) + ((1 - 2.4)^2 \cdot 0.08) + ((2 - 2.4)^2 \cdot 0.08) + ((3 - 2.4)^2 \cdot 0.36) + ((4 - 2.4)^2 \cdot 0.27)

    Calculando cada término:

    (02.4)2=5.76y5.760.21=1.2096 (0 - 2.4)^2 = 5.76 \quad \text{y} \quad 5.76 \cdot 0.21 = 1.2096

    [ (1 - 2.4)^2 = 1.96 \quad \text

This problem has been solved

Similar Questions

Based on the below table, answer the following question:xP(x)30.0540.4050.3060.1570.10What is the standard deviation?Question 3Answera.4.85b.1.06c.0.3

Calculate the standard deviation of the sample quantitative data shown, to two decimal places. x 5 10.6 2 24.7 22.3 18.9 Standard deviation:

If x is a binomial random variable with n=10 and p=0.8, the standard deviation of x is _________?Select one:a.8.0.b.1.26.c.1.60.d.64.0.e.10.

Suppose a random variable X has the following probability density function: Find standard deviation, ? (Hint :first find the value of A so that is a probability density function and then calculate standard deviation).

Find the sample standard deviation for the datax 1 2 3 4 5 6 7 8 9 10f 384 208 98 56 28 12 8 2 3 1Round to three decimals.

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.