The weighted average of the possible values that a random variable X can assume, where the weights are the probabilities of occurrence of those values, is referred to as the: variance. standard deviation. expected value. None of these choices. b) The Poisson probability distribution is a continuous probability distribution. True False c) The variance of a binomial distribution for which n = 100 and p = 0.20 is:
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
QUESTION 6
Answer the following:
a) The weighted average of the possible values that a random variable X can assume, where the weights are the probabilities of occurrence of those values, is referred to as the:
|
variance. |
|
standard deviation. |
|
|
|
None of these choices. |
b) The Poisson
True
False
c) The variance of a binomial distribution for which n = 100 and p = 0.20 is:
|
100 |
|
80 |
|
20 |
|
16 |
d) For a random variable X, E(X + 2) − 5 = E(X) − 3, where E refers to the expected value.
True
False
e) A table, formula, or graph that shows all possible values a random variable can assume, together with their associated probabilities, is called a(n):
|
probability distribution. |
|
discrete random variable. |
|
expected value of a discrete random variable. |
|
None of these choices. |
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