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Z tables are typically composed as follows: The label for rows contains the integer part and the first decimal place of Z. The label for columns contains the second decimal place of Z. The values within the table are the probabilities corresponding to the table type.
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Z-test tests the mean of a distribution. For each significance level in the confidence interval, the Z-test has a single critical value (for example, 1.96 for 5% two tailed) which makes it more convenient than the Student's t-test whose critical values are defined by the sample size (through the corresponding degrees of freedom). Both the Z ...
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A two-tailed test applied to the normal distribution. A one-tailed test, showing the p-value as the size of one tail. In statistical significance testing, a one-tailed test and a two-tailed test are alternative ways of computing the statistical significance of a parameter inferred from a data set, in terms of a test statistic. A two-tailed test ...
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Such an extension at the bottom of a letter is called a tail. It may be specified as left or right depending on which direction it turns, as in ɳ right-tail n, ɻ right-tail turned r, ɲ left-tail n, ʐ tail z (or just retroflex z), etc. Note that ŋ is called eng or engma, ɱ meng, and ꜧ heng.
Typically, Z tables provide cumulative probabilities, not percentages difference from the mean, so -2.47 would produce 0.0068. Furthermore, the example currently is very wordy and would greatly benefit from editing, and possibly the inclusion of an image of a bell curve with alpha shaded and -2.47 indicated.