The impact of three different advertising techniques is being studied by a marketing firm. Sales, in thousand dollars, categorized in four groups are shown for each advertising technique for 200 randomly selected customers exposed to each technique in Table 5-15. Can we conclude that the advertising technique has an impact on sales?

Use α= 0.10. What is the p-value?

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TABLE 5-15 Sales (thousands) Technique 1 Technique 2 Technique 3 0-99 100-199 200-299 300-399 81813 60 40 75 85 30 70 20 35 28 70 30 60 25