![]() If you do the same, you will be able to check your answers against mine. In that case, I will use the z value which ends in an even digit. Of course, the given probability may be exactly halfway between two tabulated values. For example, suppose we want (ziP = 0.4780) The probability closest to 0.4780 in Table 8.2 is 0.4778 so write z = 2.01. In that case, take the closest probability listed in the table and write its z value. A given probability P may not appear in a standard normal table. ![]() Thus, in the last example,ĮXERCISE From Table 8.2. (ziP = k) which means the value of z given that p(0 to z) = k. soz = 2.21. We shall symbolize the inverse use of Table V by writing.The corresponding numbers in the left and top margins are 2.2 and O.Ol For example, given the probability P = 0.4864, what is the corresponding value of z? To find out, we scan the body of the table and find 0.4864, shown in a box in Table 8.2. Inverse use of the table means to find the value of z (in the margins) which corresponds to a given probability in the body of the table. Thus, in Table 8.2, which is part of Table V, for z = 2.12, we find p(0 to 2.12) isĠ.4830. In the last section we used Table V by locating z in the left and top margins, then finding the corresponding probability in the body of the table. INVERSE USE OF THE STANDARD NORMAL PROBABILITY TABLE
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