lesson8-power

lesson8-power - Lesson8supplement: ThePowerofaTest

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Lesson 8   supplement:   The Power of a Test *The ppt is a joint effort: Mr DAI Liang discussed the power of a test with  Dr. Ka-fu Wong on 16 April 2007;  Ka-fu explained the problem; Liang  drafted the ppt; Ka-fu revised it.  Use it at your own risks.  Comments, if  any, should be sent to kafuwong@econ.hku.hk. 
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Imagine this scenario   At a starry night, we noticed a bright spot in the sky.  From the map, we knew that it is a system of binary stars.   However, our naked eyes could not tell.  So, we borrowed a telescope and looked at it again. 
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If it is actually two stars… Given the same telescope (or naked eyes), the larger the distance  between the two stars, the more likely we can distinguish between  them. Given the same two stars, the larger the Magnification Coefficient  (MC) of our telescope, the more likely we can distinguish between  the two stars.
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The idea of “power”!!
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lesson8-power - Lesson8supplement: ThePowerofaTest

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