Question: You have 30 observations from a normal distribution The sample

You have 30 observations from a normal distribution. The sample mean is 15 and the variance of X is 25. You want to test whether your sample is significantly greater than 13.
A) Write down the null and alternative hypotheses
B) Calculate your Z statistic.
C) Can you reject the null hypothesis at the 5% significance level? (Report your critical value) D) Can you reject the null hypothesis at the 1% significance level? (Report your critical value)


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  • CreatedJuly 26, 2013
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