Suppose you are doing a research study, and despite warnings from your teacher not to do so, you have decided to use an alpha level of .10. First, explain what this means in plain English. Second, explain why your teacher thinks using an alpha level of .10 is a bad idea.
What will be an ideal response?
Ans: First, with an alpha level of .10, you are willing to accept a 10% chance that you will obtain a result in your sample that does not really exist in the population. That is, your result was a function of random variation in your sample. Second, it is a bad idea to use a .10 alpha level because this is considered too much willingness to accept a result based on random variation. An alpha of .05 is commonly accepted in research.
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