People substitute various combinations of cinnamon, nutmeg, allspice, coriander, and ginger, but you won't get something that tastes like cardamom. Not that it won't be good, it just won't be cardamom. Scout around for ethnic markets; it will often be cheaper there. Middle Eastern or Indian are what I'd try first.
The t-test and the one-way analysis of variance (ANOVA) are the two most common tests used for this purpose. The t-test is a statistical hypothesis test where the test statistic follows a Studentâs t distribution if the null hypothesis is supported. This test is applied when the test statistic follows a normal distribution and the value of a scaling term in the test statistic is known.
In its simplest form, ANOVA provides a statistical test of whether or not the means of several groups are equal, and therefore generalizes the t-test to more than two groups. ANOVAs are useful for comparing (testing) three or more means (groups or variables) for statistical significance.