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#How to read standard normal table how to
How to Read a Z-Score Table For the sake of example, suppose Z is a normally distributed random variable and you want to compute P(0.46 < Z < 2.09). The probability to the left of z 0.87 is 0. Your question should therefore be modified to ask "*How do I deal with the fact that my table doesn't go as high as my $Z$ value?*" Once you have a set of scaled or standardized data, you can use a Z-Score table or normal distribution probability calculator to compute the probability that the random variable Z is between two values. A typical four-decimal-place number in the body of the Standard Normal Cumulative Probability Table gives the area under the standard normal curve that lies to the left of a specified z-value.
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Your problem appears to be that your table doesn't go further. Therefore, the 10th percentile of the standard normal distribution is -1.28.The standard normal ranges from $-\infty$ to $\infty$. 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. Title: Cumulative Normal Distribution Table Author: Society of Actuaries Subject: View the cumulative normal distribution table. The question is asking for a value to the left of which has an area of 0.1 under the standard normal curve. To find the probability between these two values, subtract the probability of less than 2 from the probability of less than 3.