In target, approximately 73 people out of 100 will buy something that they don’t need. Assuming that this is a binomial distribution and n = 100 and p = .73… a. Find the probability of at least 90 people buying something that they don’t need. b. Is 90 significantly high?
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.
In target, approximately 73 people out of 100 will buy something that they don’t need. Assuming
that this is a binomial distribution and n = 100 and p = .73…
a. Find the
b. Is 90 significantly high?
a.
The random variable X is defined as the number of people buying something that they don't need which follows the binomial distribution with sample size 100 and probability of success 0.73.
The probability of at least 90 people buying something that they don’t need is,
Thus, the probability of at least 90 people buying something that they don’t need is 0.00003.
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