If the probability P(z ≥ 0.57) needs to be determined, this is given as follows: This value is 0.71566 which is the required answer. Now find the intersection of the row of the first two digits and the column of the second decimal value in the z score table.This value is 0.07 and it is the 8 th entry in the first row. Next, take the second digit after the decimal and map it in the first row.Here, 0.5 is taken and it is the 6 th entry in the first column. Take the first two digits of the z score and find them in the first column of the z table.As the z score in the example is positive, the positive z table is used.
The steps to use the z score table are as follows:
Suppose a z score is given as P(z ≤ 0.57) and the area to the left of this value needs to be determined. Thus, it is necessary to choose the correct z table in order to accurately map the z score. This implies that the raw score is either to the left of the mean or to the right respectively. The value of the z score can either be negative or positive.
