The commercial for the new Meat Man Barbecue claims that ittakes 20 minutes for assembly. A consumer advocate thinks that theassembly time is lower than 20 minutes. The advocate surveyed 11randomly selected people who purchased the Meat Man Barbecue andfound that their average time was 19.7 minutes. The standarddeviation for this survey group was 2.1 minutes. What can beconcluded at the the ?? = 0.05 level of significance level ofsignificance?

1. For this study, we should use Select an answert-test for apopulation meanz-test for a population proportion
2. The null and alternative hypotheses would be:

H0:H0:   ?p? ??=<>   

H1:H1:   ?p? ?

3. The test statistic ?zt = (please show your answer to 3 decimalplaces.)
4. The p-value = (Please show your answer to 4 decimalplaces.)
5. The p-value is ?>? ??
6. Based on this, we should Select an answerfail torejectrejectaccept the null hypothesis.
7. Thus, the final conclusion is that ...
   • The data suggest the populaton mean issignificantly lower than 20 at ?? = 0.05, so thereis statistically significant evidence to conclude that thepopulation mean amount of time to assemble the Meat Man barbecue islower than 20.
   • The data suggest the population mean is notsignificantly lower than 20 at ?? = 0.05, so thereis statistically insignificant evidence to conclude that thepopulation mean amount of time to assemble the Meat Man barbecue isequal to 20.
   • The data suggest that the population mean amount of time toassemble the Meat Man barbecue is notsignificantly lower than 20 at ?? = 0.05, so thereis statistically insignificant evidence to conclude that thepopulation mean amount of time to assemble the Meat Man barbecue islower than 20.