3. Testing a population mean - Reaching a conclusion by the rejection region approach You conduct a hypothesis test of a population mean.Hat a significance level of a =0.05 using a sample of size n'...

Extracted text: 3. Testing a population mean - Reaching a conclusion by the rejection region approach You conduct a hypothesis test of a population mean.Hat a significance level of a =0.05 using a sample of size n' 46.The populatlon standard'deviation o Is known, so you use the sfandardižed test'stătistic2. Your test statistic follows a standard normal distribution'when the null hypothesis Use the Distributions tool to help you answer the questions that follow. Select a Dist.. Distributions 0 1 2 /3 If you perform a left-tail test, the rejection region for your test statistic is z 3 -za. The boundary of your rejection region, is: -Za = (Hint: The value you enter should be a negative number and include the minus sign.) You region: the null hypothesis in this case, because the test statistic falls in the z< -za="" z=""> -za If you perform a two-tail test, the rejection region for your test statistic consists of values in the regions z s -za/2 and z 2 za/2. The boundaries of your rejection region are: -Za/2 = and za/2 = the null hypothesis in this case, because the test statistic falls in the You region: -za/2 < z="">< za/2="" z=""> Za/2 O zs -za/2