Hypothesis Testing

***Please use Minitab and be sure to show images and steps used in Minitab***

Answer the following question using Minitab. Show your results with the question stated clearly using statistical symbols where necessary. Also provide explanations as needed.

For the data below, state which test is appropriate and the null and alternative hypotheses. Then use Minitab to perform the test and calculate the appropriate confidence interval.

Question 1: The rainfall was measured on nine days and the results (in mm) were:

11.7 12.2 10.9 11.4 11.3 12.0 11.1 10.7 11.6

Is the mean rainfall significantly different from 12.1 mm (the average measured over the same period last year)? The standard deviation is assumed known and is 0.45mm.