The heights of 10 year old American children are normally distributed with a mean height of 4 feet and 5 inches (or 53 Inches) and a standard deviation of 4.25 inches. In order to be allowed to go on a particular kids ride at the amusement park, children must be at least 46.2 Inches tall and no more than 58.95 inches tall. Use the Cumulative Z-Score Table to answer the following questions. Write your answers as a percent with two decimal places. What percent of 10 year old American children cannot go on the ride? % Hint
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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