math,correction

posted by .

Find expected value for the random variable.
its suppost to be a table 6 X 2 i used the .... to represent separation

z.....3......6.....9.....12.......15
p(z)..0.14..0.29..0.36..0.11...0.10


So what i did is i said

e(x) = 3 (0.14)+ 6(0.29)+ etc to all the rest. and my result was 8.22 am i correct that would be the expected value for the reandom variable.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Intro to probability

    Two balanced coins are tossed. What are the expected value and the variance of the number of heads observed?
  2. stats

    Consider an infinite population with 25% of the elements having the value 1, 25% the value 2, 25% the value 3, and 25% the value 4. If X is the value of a randomly selected item, then X is a discrete random variable whose possible …
  3. Statistics

    x is a random variable with the probability function: f(X) = x/6 for x = 1, 2 or 3 the expected value of X is?
  4. Math

    What is the probability that the random variable has a value between 0.1 and 0.5?
  5. English

    Can you please tell me if these sentences should be evaluated as grammatically wrong in a test?
  6. Elementary statistics

    Nine apples, four of which are rotten, are in a refrigerator. Three apples are randomly selected without replacement. Let the random variable x represent the number chosen that are rotten. Construct a table describing the probability …
  7. math 3

    A bag contains 4 yellow, 2 red, and 6 green marbles. Two marbles are drawn. The first is replaced before the second is drawn. A random variable assigns the number of red marbles to each outcome. Calculate the expected value of the …
  8. math

    A jar contains 8 pennies, 3 nickels and 4 dimes. A child selects 2 coins at random without replacement from the jar. Let X represent the amount in cents of the selected coins. Find the expected value of X.
  9. Stats

    Y is a discrete random variable. The table below reports the values of Y and the corresponding frequency, n (the number of observations for each value). Based on this information, what is the expected value of Y?
  10. math

    You are riding your bike at a constant speed of 30 feet per second. A friend uses a stopwatch to time you as you are riding along a city block that is 240 feet long. 1. Make a table to represent the situation where the independent …

More Similar Questions