Ethnic Diversity The following pie chart shows the ethnic makeup of schools in a state for the 2006-2007 academic year. 9% 8% 9% I Asian 1 Other I African American I Hispanic or Latino I White (not Hispani 45% 29% Write down the probability distribution showing the probability that a randomly selected student in 2006- 2007 belonged to one of the ethnic groups named. Outcome Probability Hispanic or Latino White (not Hispanic) African American Asian Other What is the probability that a student is neither white nor Asian?
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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