Suppose that orders at a restaurant are iid (independent and identically distributed) random variables with mean $8 and standard deviation $2. Estimate the probability that the first 100 customers spend a total of more than $840. Estimate the probability that the first 100 customers spend a total of between $780 and $820. After how many orders can we be 90% sure that the total spent by all the customers is more than $1000.
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.
Suppose that orders at a restaurant are iid (independent and identically distributed) random variables with
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