Tuesday

September 2, 2014

September 2, 2014

Posted by **George** on Thursday, October 11, 2012 at 12:04pm.

Accidents 0,1 2 Probability .5, ?, .2

P(X=1) =

E(x) = µx =

Standard deviation =

- Stats -
**MathGuru**, Thursday, October 11, 2012 at 7:10pmNote: Your ? value should be .3 because each probability will then add to 1.

To find the mean:

SUM [x * P(x)]

Multiply each x by its respective probability P(x). Add together for a total. This will be your mean.

To find variance:

SUM [x^2 * P(x)] - mean^2

Square each x. Multiply each squared x by its respective probability P(x). Add together for a total. Square the mean. Subtract the squared mean from the total. This will be your variance.

To find standard deviation:

Take the square root of the variance.

Hopefully, this information will help you with other problems of this type.

**Answer this Question**

**Related Questions**

probability - There is a .97 chance that no accident will occur during any ...

Statistics - I have a problem I need some help on. I have answered parts. Any ...

statistics - The number of accidents per week at a hazardous intersection ...

Math - The number of accidents that occur at the intersection of Pine and Linden...

MATH - The number of accidents that occur at the intersection of Pine and Linden...

Math - The number of accidents that occur at the intersection of Pine and Linden...

math157 - The number of accidents that occur at the intersection of Pine and ...

math - The number of accidents that occur at the intersection of Pine and Linden...

math/graphing - The number of accidents that occur at the intersection of Pine ...

MATH Prob. - The number of accidents that occur at the intersection of Pine and ...