A study has shown that the probability distribution of X, the number of customers in line (including the one being served, if any) at a checkout counter in a department store, is given by: Number of Customers - X Probability - P(X) 0 0.25 1 0.25 2 0.2 3 0.2 4 0.1 What is the standard deviation of the number of customers in line to three decimal places?
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.
A study has shown that the probability distribution of X, the number of customers in line (including the one being served, if any) at a checkout counter in a department store, is given by:
|
Number of Customers - X |
Probability - P(X) |
|---|---|
|
0 |
0.25 |
|
1 |
0.25 |
|
2 |
0.2 |
|
3 |
0.2 |
|
4 |
0.1 |
What is the standard deviation of the number of customers in line to three decimal places?
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