Question description
 The following is suppose to represent probability distribution table. What is the missing value?
X
P(X)
3
0.4
5
0.5
9
?
 Find the expected value of X using the table below.
X
P(X)
0
0.4
1
0.3
─1
0.3
 If the standard deviation of a random variable is 5,what is its variance?

Any normal distribution is
continuous
discrete
5.
some are discrete, some are continuous
a binomial distribution
6.
is Poisson distribution
 Let X be a binomial random variable with number of trials 100 and expected value 20. What is the probability of success of X?

There are 17 blue, 5 green, and 3 red balls in a jar. We randomly select a ball and return it back to the jar. We repeat it 8 times. To find the probability of the event that every time we get a green ball we need to use the following distribution:
binomial with number of trials 8 and probability of success 0.2
binomial with number of trials 25 and probability of success 0.5
binomial with number of trials 5 and probability of success 0.2
binomial with number of trials 8 and probability of success 0.8
binomial with number of trials 8 and probability of success 1/3
Poisson Distribution with average 5
Poisson Distribution with average 8
binomial with number of trials 25 and probability of success 0.2