Pizza Diameters. In the article, “Assessing Claims Made by a Pizza Chain” by P. Dunn, (Journal of Statistics Education, Vol. 20, No. 1, pp. 1–19), a sample of pizzas from Domino’s was collected.

The intention of the study was to test the claim of a local pizza shop that its pizzas are bigger than Domino’s. The following table gives the diameters, in centimeters (cm), of 41 large Supreme pizzas from Domino’s. 29.40 27.45 26.38 26.50 26.55 26.64 26.87 26.61 29.33 26.67 26.09 29.32 27.12 26.83 27.04 29.17 27.14 27.04 29.19 26.26 26.16 26.70 28.78 29.33 27.27 28.90 29.14 29.23 28.32 27.12 27.05 28.44 26.97 27.52 26.79 26.54 26.70 28.79 28.97 28.84 26.71