Advertisements
Advertisements
Question
Choose the correct alternative:
Which of the following is not possible in probability distribution?
Options
`sum"p"(x) ≥ 0`
`sum"p"(x) = 1`
`sumx"p"(x) = 2`
`"p"(x) = -0.5`
Advertisements
Solution
`"p"(x) = -0.5`
APPEARS IN
RELATED QUESTIONS
For the random variable X with the given probability mass function as below, find the mean and variance.
`f(x) = {{:(1/10, x = 2"," 5),(1/5, x = 0"," 1"," 3"," 4):}`
For the random variable X with the given probability mass function as below, find the mean and variance.
`f(x) = {{:(1/2 "e"^(x/2), "for" x > 0),(0, "otherwise"):}`
Choose the correct alternative:
A random variable X has binomial distribution with n = 25 and p = 0.8 then standard deviation of X is
Choose the correct alternative:
If X is a binomial random variable with I expected value 6 and variance 2.4, Then P(X = 5) is
Define Mathematical expectation in terms of discrete random variable
Choose the correct alternative:
E[X – E(X)] is equal to
Choose the correct alternative:
If p(x) = `1/10`, x = 10, then E(X) is
Choose the correct alternative:
An expected value of a random variable is equal to it’s
Choose the correct alternative:
The distribution function F(x) is equal to
Prove that V(aX) = a2V(X)
