Test the null hypothesis that a population mean is 50 against the alternate hypothesis that the mean is not 50.
The data is of ratio level.
A sample of 400 showed a sample mean of 51.5 and a sample standard deviation of 10.
Use the full, formal hypothesis testing format.
What "model" should be used and why?© BrainMass Inc. brainmass.com March 4, 2021, 11:03 pm ad1c9bdddf
5-Step Hypothesis Test
Step1: State the Null and Alternate Hypothesis:
Null Hypothesis: The population mean is 50.
Alternate Hypothesis: The population mean is not 50.
Step2: Formulate an Analysis Plan:
Since the data has been measured in ratio scale and sample size, n > 30, the distribution can be assumed to be a normal ...
The solution provides step-by-step method of performing a 5 step hypothesis test. All the steps of hypothesis testing (formulation of null and alternate hypotheses, selection of significance level, choosing the appropriate test-statistic, decision rule, calculation of test-statistic and conclusion) have been explained and the statistical analysis has been shown in details. The calculations have also been shown in Interactive EXCEL sheet for better understanding.