Find the variance and standard deviation of the following random variable. Hint: start by writing the distribution for the random variable X2 . x P(X = x) 0 0.5 1 0.2 2 0.3

Q: e. Find the standard deviation of the random variable X.

A: A random Sample of 200 residents; n=200 p=0.254

Q: Use the fact that the mean of a geometric distribution is μ=1p and the variance is σ2=qp2.   A daily…

A: The given is, p=11000=0.001Mean =µ =1p=1000Variance =qp2=1-0.0010.0012=999000Standard deviation…

Q: Use the fact that the mean of a geometric distribution is u and the variance is o A daily number…

A:

Q: Let X and Y be independent random variables representing the lifetime (in one billion years) of Type…

A: Given data is mean of X is 3mean of Y is 11we have to find the variance of the total life time of 3…

Q: Find the variance of x or the number of cups of coffee.

A: Given Information:

Q: Suppose the variance of X is 14. What is the variance of .47X?

A: The objective of this question is to find the variance of a random variable that has been scaled by…

Q: Find the variance and standard deviation of each of the following probability distributions. Write…

A: Given that  The probability mass function of X is  x 0 1 2 3 P(x) 0.10 0.45 0.25 0.20 Note:…