Adam thinks the five people who sit next to him in class spend the same amount of money on their haircut on average. To find out he keeps track of how much their haircuts cost for the next couple of months. Assuming the cost of a haircut is random, normal, and the variances are the same, test if the average cost is equal (the tip is included in the price). Name Number of haircuts Average Cost Standard deviation for one haircut
Mallory 7 16.7 6.5
Matt 20 15.2 8
Stacey 18 16.1 5
Whitney 15 20.8 5.3
James 23 20.2 6

Use three decimal places in the table

DF SS MS F
Groups
Error
Total