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z table the t table for the t distribution is different from the z table for the z distribution make sure you understand the values in the first and last rows z table standard normal table z z table z score table example z table z table source the cumulative normal were generated in excel z table practice using the z table z table sample z table z table the z table shows the area to the left of the z score the area to the left of the z score is the probability that a sample value will fall within that z table standard normal z table area between 0 and z z table z score z table z z table 1 values for n on the day of the month provide a good estimate error 1 of n averaged over all days within the month z table steps in finding the area using the z score table z table unit 8 4 the normal distribution video z score table z table z normal z table positive z score table