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Age group (years) Rating 15-20 21-30 Over 30 Excellent Good Fair Poor 18 25 17 20 27 43 26 2 (True or False) A market research firm has distributed samples of a new shampoo to a variety of individuals. The following data summarize the comments of these individuals about the shampoo as well as provide the age group into which they fall. Use the 5 percent level of significance, these data prove that different age groups have different opinions about the shampoo True O False

b. what is the degree of freedom in this problem?

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