SilentHamster
SilentHamster SilentHamster
  • 03-02-2017
  • Mathematics
contestada

Help me find Sample variance and standard deviation

Help me find Sample variance and standard deviation class=

Respuesta :

LammettHash
LammettHash LammettHash
  • 03-02-2017
First, find the mean. You'll need it to compute the variance.

[tex]\bar x=\displaystyle\frac15\sum_{i=1}^5x_i=\dfrac{21+10+6+7+11}5=11[/tex]

The variance of the sample is then computed with the formula

[tex]s^2=\displaystyle\dfrac1{5-1}\sum_{i=1}^5(\bar x-x_i)^2=\dfrac{(21-11)^2+\cdots+(11-11)^2}4=\dfrac{71}2=35.5[/tex]

The standard deviation is the square root of the variance, so

[tex]s=\sqrt{35.5}\approx5.958[/tex]
Answer Link

Otras preguntas

pribahasa yang berarti mengharapkan imbalan
Use the functions f and g in c[−1, 1] to find f, g , f , g , and d(f, g) for the inner product f, g = 1 f(x)g(x)dx −1 . f(x) = x, g(x) = e−x
Jamal draws triangle XYZ. If angle X=46 degrees, XZ = 10 degrees, and YZ=8 degrees, what is the approximate length of XY?
was literature important in feudal Japan, and if so why?
Least to greatest 66.1%, 0.66, 2/3, 0.666
the formula for the volume of a cone can be constructed using what fraction of the area of a circle formula?
What was the goal of the american island hopping strategy answers?
Ways to get ur credit up
The mitral valve, located between the left atrium and left ventricle, is also called the:
Your service contract for washer repair maintenance is offered at $48 per year. If a customer wants to pay it off in equal monthly installments for one year and