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 5-8. Can we conclude that the advertising technique has an impact on sales? Use α = 0.10. What is the p-value?
Table 5-8

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Sales (thousands) 0.99 100-199 200-299 300-399 Technique I 60 85 20 35 Technique 2 40 30 70 60 Technique 3 75 70 30 25