Weekly Ford sales follow a normal distribution, with amean of 50,000 cars and a standard deviation of 14,000cars.a There is a 1% chance that Ford will sell more thancars during the next year.b The chance that Ford will sell between 2.4 and 2.7million cars during the next year is .
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!
Weekly Ford sales follow a
mean of 50,000 cars and a standard deviation of 14,000
cars.
a There is a 1% chance that Ford will sell more than
cars during the next year.
b The chance that Ford will sell between 2.4 and 2.7
million cars during the next year is .
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