So I have an statistic that says that the average price of a hamburger in USA is 2.65$

so I need to use a hypothesis testing procedure to analyze the data and give supporting reasons for the choice of the procedure usedand also include the p-value of the test and the level of significance.

here is the data I have :

1. McDonalds = 2.19
2. Burger King = 2.89
3. Shake shack = 6.79
4. Wendy's = 2.81
5. Dairy Queen = 5.99
6. Five Guys = 10.67
7. Applebee's = 13.19
8. Outback = 14.28

and here is some data I collected

Mean = 7.3513

Median = 6.39

Mode = 2.19

STD = 4.8173

SEM = 1.7032