STAT 1000 Lecture Notes - Lecture 34: Null Hypothesis, Confidence Interval, Standard Deviation
4 Dec 2017
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If p-value a: confidence interval method: A manufacturer is interested in output voltage of a power supply used in a computer. = 0. 25 volts. the manufacturer does not what the voltage to be anything other than 5 volts, on average. test this claim at the 5% level of significance. We take a srs of 8 computers and found the mean of those samples to be 4. 83 volts. Since our p-value is greater than the level of significance, we . The null hypothesis, there is insufficient evidence to support the alternative the mean voltage differs from 5 volts. Interpretation of the p-value: our p-value tells us, if the null hypothesis was true there would be a 5. 5% chance that we would obtain a sample mean as extreme as 4. 83 volts. Unit 10 - inference for the mean of a population when . Suppose a srs of size n is drawn from a normal population. when .
