A machine has a useful life of 4 to 9 years, and its life (in years) has a probability density function defined by f(x) = 1 . Find the probability that the useful life of such a machine selected 15 at random will be longer than 7 years?

Q: Suppose that the probability density function of the length of computer cables is f (x) = 0.1 from…

A:

Q: Suppose X is a random variable taking values in the interval [0,2] with probability density function…

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Q: For some electronic component, the time until failure has Gamma distribution with parameters α = 2…

A: Given: α=2λ=2

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Q: I don't understand this.

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Q: Suppose that the probability density function of the length of computer cables is f (x) = 2x/(32)…

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Continuous Probability Distributions

Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.

Normal Distribution

Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!