The time till failure of xenon bulbs has an Exponential distribution and it is known that 20% of the bulbs have failed by 1000 hours a) What is the probability that a bulb is still working after 4000 hours? b) Find the mean of the time till failure.
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 time till failure of xenon bulbs has an Exponential distribution and it is known that 20% of the bulbs have failed by 1000 hours
a) What is the probability that a bulb is still working after 4000 hours?
b) Find the mean of the time till failure.
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