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Why is an alpha level of .05 commonly used?

Seeing as the alpha level is the probability of making a Type I error, it seems to make sense that we make this area as tiny as possible. For example, if we set the alpha level at 10% then there is large chance that we might incorrectly reject the null hypothesis, while an alpha level of 1% would make the area tiny. So why not use a tiny area instead of the standard 5%? The smaller the alpha level, the smaller the area where you would reject the null hypothesis. So if you have a tiny area, there�s more of a chance that you will NOT reject the null, when in fact you should. This is a Type II error. In other words, the more you try and avoid a Type I error, the more likely a Type II error could creep in. Scientists have found that an alpha level of 5% is a good balance between these two issues. There are two approaches (at least) to conducting significance tests. In one (favored by R. Fisher), a significance test is conducted and the probability value reflects the strength of the ...
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Right to Food, Right to Farm

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Last summer, Missouri voters narrowly approved a right to farm amendment to the Missouri Constitution. It appears that the supporters' expectation is that the amendment will ban the state from putting any environmental, animal welfare, health, etc. (read: costly) restrictions on their farming practices. While the actual effect of the amendment is still unclear, supporters spent over $1 million dollars toward the passage of the right to farm. Having freedom to farm is all well and good, but what good is a right to farm without the demand for farm products? The upturn in U.S. agriculture correlates not with any recognition of a right to farm, but rather with an international recognition of the right to food . The combination of World War I and the great depression saw a large downturn in U.S. agriculture and the subsequent creation of federal farm subsidies . On the one hand, the federal farm subsidies helped U.S. farmers continue to farm. On the other hand, these farmers were...
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