The commercial for the new Meat Man Barbecue claims that it takes 9 minutes for assembly. A consumer advocate thinks that the assembly time is higher than 9 minutes. The advocate surveyed 12 randomly...

The commercial for the new Meat Man Barbecue claims that it takes 9 minutes for assembly. A consumer advocate thinks that the assembly time is higher than 9 minutes. The advocate surveyed 12 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 12.5 minutes. The standard deviation for this survey group was 3.5 minutes.  What can be concluded at the the αα = 0.10 level of significance level of significance?

1. For this study, we should use Select an answer z-test for a population proportion t-test for a population mean


2. The null and alternative hypotheses would be: