Attempts: Do No Harm: 16 5. Testing a population mean - Reaching a conclusion by

Question

Attempts: Do No Harm: 16 5. Testing a population mean - Reaching a conclusion by the p-value approach Aa Aa You conduct a hypothesis test about a population mean at a significance level of -.05 using a sample of size n = 53. The population standard deviation is known, so you use the z test statistic. Your test statistic follows a standard normal distribution when the null hypothesis is true as an equality, and its value obtained from the sample is z- 2.50. Use the Distributions tool to help you answer the questions that follow Select a Distribution- Distributions If you perform a lower tail test, the p-value is because the p-value is You than the significance level. the null hypothesis in this case, If you perform a two-tailed test, the p-value is because the p-value is . You the null hypothesis in this case than the significance level. Sessio

Explanation / Answer

Z = -2.50

If you perform a lower tail test, the p value is 0.0062. You reject the null hypothesis in this case, because the p value is less tha the significance level.

If you perform a two tailed test . the p value is 0.0124. You reject the null hypothesis in this case, because the p value is less than the significance level.

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