EXAMPLE 6.22 Information Provided by the -Value

Suppose that the test statistic for a two-sided significance test for a population mean is . From Table A, we can calculate the -value. It is

We have failed to meet the standard of evidence for . However, with the information provided by the -value, we can see that the result just barely missed the standard. If the effect in question is interesting and potentially important, we might want to design another study with a larger sample to investigate it further.