PROBABILITY DISTRIBUTION PROBLEM...

HELP!!!!!

The number of tennis balls ordered by club members of a country club pro shop has this probability distribution. Balls are packaged in a can of 3. Complete the table shown [you may use Excel] and find the mean, variance, and standard deviation for the distribution. Round b, c and d to 2 decimal places as needed


x P(x) x ? P(x) Round to 2 decimals x - ? Round to 2 decimals (x - ?)2 Round to 4 decimals P(x) ? (x - ?)2
Round to 4 decimals
3 0.14
6 0.08
9 0.36
12 0.32
15 0.10
? x ? P(x) = ? P(x) ? (x - ?)2 =

3a. Complete the Table


3b. What is the Mean?


3c. What is the Variance?


3d. What is the Standard Deviation:

Did you calculate x*p(x) and (x^2)*p(x) for each of the given values in the table? That would be a good place to start. You would be almost done if you would do that.