ADM 2304 Lecture Notes - Lecture 4: Null Hypothesis, Standard Deviation, Test Statistic
13 May 2017
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Therefore, we reject the null hypothesis: state conclusion: If the true mean waiting time really were 30 min, the chance of picking a srs of size 100 that gives a mean of 34. 05 is less than . 0001. Therefore, there is strong evidence that the target waiting time is not being met. > three permutations of the test depending on the form of the alternative hypothesis. Greater than like previous example, less than , not equal to . > format is the same for each except for the determination of when to reject. > when we estimate the sd of a statistic using the data, we call it the standard error (se) of the statistic. Assume the sample is from a normal population; replace ! by s, the sample standard deviation. So, x has a sd of n and a se of s n. The new test statistic is x 0 s / n.
