In an article "Shelf-Space Strategy in Retailing," published in Proceedings: Southern Marketing Associa- tion, the e?ect of shelf height on the supermarket sales of canned dog food is investigated. An experiment was conducted at a small supermarket for a period of 8 days on the sales of a single brand of dog food, referred to as Arf dog food, involving three levels of shelf height: knee level, waist level, and eye level. During each day, the shelf height of the canned dog food was randomly changed on three di?erent occasions. The remaining sections of the gondola that housed the given brand were ?lled with a mixture of dog food brands that were both familiar and unfamiliar to customers in this par- ticular geographic area. Sales, in hundreds of dollars, of Arf dog food per day for the three shelf heights are given. Based on the data, is there a signi?cant di?er- ence in the average daily sales of this dog food based on shelf height? Use a 0.01 level of signi?cance.
Shelf Height
Knee Level Waist Level Eye Level
77 88 85
82 94 85
86 93 87
78 90 81
81 91 80
86 94 79
77 90 87
81 87 93