permeability index Jater permeablity nd standard deviation 150. oncrete can be measured by letting water flow across surface and determining the randomly selected concrete specimen normally distnibuted with mean value 1,000 n USE SALT (a) How likely is it that a single randomly selected specimen will have a permeability index between 850 and 1,300? (Round your answer to four decimal places.) P(850
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!
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