The t-test is commonly used to examine whether exactly two groups are significantly different from each other on some score or measure.
The t-test is a a type of inferential statistic used to compare the means of two groups. This is often used in hypothesis testing to determine if a process really affects the population of interest, or if the two groups are different from each other. The t-test shows how important the difference between group means is. It notifies you if these differences may have occurred by mistake. Companies use the t-test to compare two different means and see if they come from the exact same population.
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Producers, Consumers, and Money
If producers can not make items and consumers can not buy gems both without having money then items become scarce.
It allowed for the mass production of books so that more people had access to books. Literature was no longer exclusive to the elite, so more people had the resources to learn how to read and write.
