![]() ![]() Therefore, the 10th percentile of the standard normal distribution is -1.28. Use table A to ind the proportion of observations from a standard Normal distribution that satis ies each of the following statements. We look to the leftmost of the row and up to the top of the column to find the corresponding z-value. We search the body of the tables and find that the closest value to 0.1000 is 0.1003. Since the entries in the Standard Normal Cumulative Probability Table represent the probabilities and they are four-decimal-place numbers, we shall write 0.1 as 0.1000 to remind ourselves that it corresponds to the inside entry of the table. The question is asking for a value to the left of which has an area of 0.1 under the standard normal curve. A large number of random variables are either nearly or exactly represented by the normal distribution, in every physical science and economics. ![]() Sometimes it is also called a bell curve. \(P(Z<3)\) and \(P(Z<2)\) can be found in the table by looking up 2.0 and 3.0. In probability theory and statistics, the Normal Distribution, also called the Gaussian Distribution, is the most significant continuous probability distribution. To find the probability between these two values, subtract the probability of less than 2 from the probability of less than 3.
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