Monday

October 20, 2014

October 20, 2014

Posted by **darius** on Tuesday, August 28, 2007 at 10:15pm.

- statistics -
**MathGuru**, Tuesday, August 28, 2007 at 11:41pmYour data:

X P(X)

0 0.50

1 0.41

2 0.05

3 0.04

Here's a formula for the mean:

SUM[X * P(X)]

(Take each X times its respective P(X), then sum for a total. This will be your mean.)

Here's a formula for the standard deviation:

SQRT of {SUM[X^2 * P(X)] - mean^2}

(Square each X. Take each X^2 times its respective P(X), then sum for a total. Subtract mean^2 from this value. Then take the square root of that result. This will be your standard deviation.)

I hope this will help get you started.

- statistics -
**steve**, Monday, August 12, 2013 at 1:14pm0.57

**Answer this Question**

**Related Questions**

math - A police department reports that the probabilities that 0,1,2, and 3 ...

statistics - A police department reports that the probabilities that 0, 1, 2, ...

Econ Help - Trying to study for test, don't understand. (3) Suppose that the ...

MATHS - Could you please help? On July 5, in the area around Center Village, ...

Math - On July 5th six different people reported to the police that they had ...

Social Studies - What branch of the government does a police department fall ...

STATISTICS - The Sarasota Police department collected data on the number of car ...

Accounting - You have been hired into a new company to oversee the accoutning ...

Statistics - Blossom’s Flowers purchases roses for sale for Valentine’s Day. The...

English - choose a word Indeed,police claim that it is probably young (d)..........