Z Probability Table Math
This table is very useful for finding probabilities when the event in question follows a normal distribution.
Z probability table math. To find the probability that z is between two values use the z table to find the probabilities corresponding to each z value and then find the difference between the probabilities. That s where z table i e. First use the z table to find the value where the row for 1 0 intersects with 0 00 which is 0 1587. Then find the value where the row for 1 0 intersects with the column for 0 00 which is 0 8413.
Standard normal distribution table comes handy. If you noticed there are two z tables with negative and positive values. The probability is 0 9750. See z score for more information.
Z score 700 600 150 0 67 now in order to figure out how well george did on the test we need to determine the percentage of his peers who go higher and lower scores. To look up the probability of z being less than 1 96 for example look in the row for 1 9 and the column for 0 06. Equivalently it gives the probability that any normal random variable will not exceed a value more than a given number of standard deviations above its mean.