Test of Independence · Exercise 24

A major food manufacturer is concerned that the sales for its skinny french fries have been decreasing. As a part of a feasibility study, the company conducts research into the types of fries sold across the country to determine if the type of fries sold is independent of the area of the country. The results of the study are shown in. Conduct a test of independence.

$$\begin{array}{ccccc}\text{Type of Fries}& \text{Northeast}& \text{South}& \text{Central}& \text{West}\\ \text{Skinny fries}& \text{70}& \text{50}& \text{20}& \text{25}\\ \text{Curly fries}& \text{100}& \text{60}& \text{15}& \text{30}\\ \text{Steak fries}& \text{20}& \text{40}& \text{10}& \text{10}\end{array}$$

This is an open-ended exercise: its source gives no single answer.

OpenStax, Introductory Business Statistics 2e · §11.4 Test of Independence · Exercise 24