The number of earthquake notifications per year in a community follows the probability mass function x 0 1 2 P(X=x) 0.85 0.1 0.05 1. How many earthquake notifications can be expected in a year? What is the standard deviation? 2. Each notification costs the city $15000. Write the probability mass function of Y, the total cost to the city and calculate the expected cost and the standard deviation of the cost.
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.
The number of earthquake notifications per year in a community follows the probability mass
| x | 0 | 1 | 2 |
| P(X=x) | 0.85 | 0.1 | 0.05 |
1. How many earthquake notifications can be expected in a year? What is the standard deviation?
2. Each notification costs the city $15000. Write the probability mass function of Y, the total cost to the city and calculate the expected cost and the standard deviation of the cost.
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