Consider a group of four high school students with ages 15, 16, 18, and 19. A sample of two students is chosen randomly without replacement. Let random variable X be the age of the students. a) Determine the probability distribution of the sample mean X . b) Find the mean and the standard deviation of X by using the probability distribution of X .
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.
Consider a group of four high school students with ages 15, 16, 18, and 19. A sample of two students is chosen randomly without replacement. Let random variable X be
the age of the students.
a) Determine the
b) Find the mean and the standard deviation of X
by using the probability
distribution of X .
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