The standard normal curve N(0,1) has a mean=0 and s.d.=1. Z-score is sore on the standard normal distribution and should be interpreted as the number of standard deviations where the data point is below or above the average or the mean. To find the area P under the normal probability curve N(mean, standard_deviation) within the interval (left, right), type in the 4 parameters and press 'Calculate'. This table gives the area under the normal curve between the mean and a point Z standard deviations above the mean. Using the standard normal table, we can find out the areas under the density curve. Java Normal Probability Calculator (required JavaScript) (The table is based on the area P under the standard normal probability curve, below the respective z-statistic.) The area within an interval (a,b) = normalcdf(a,b) = (It is not integrable algebraically.) The z- is a N(0, 1) distribution, given by the equation: STANDARD NORMAL DISTRIBUTION: Table Values Re resent AREA to the LEFT of the Z score.

Z standard normal table