The following results were gathered from a survey where three toothpaste brands were tested by three groups. (For example, when 50 people tried Brand A toothpaste for a year, they got zero to one new cavities.) Brand A Brand B Brand C # of New Cavitties 0-1 3-Feb 4 or more 50 22 41 29 39 38 Determine if there is a significant difference in the effectiveness of these toothpastes in preventing cavities. Select the appropriate conclusion. Select one: a. At an alpha of 0.18 there is NOT a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are independent. b. At an alpha of 0.18 there is a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are not independent. c. At an alpha of 0.25 there is NOT a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are independent. d. At an alpha of 0.05 there is a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are not independent. The following results were gathered from a survey where three toothpaste brands were tested by three groups. (For example, when 50 people tried Brand A toothpaste for a year, they got zero to one new cavities.) Brand A Brand B Brand C # of New Cavitties 0-1 3-Feb 4 or more 50 22 41 29 39 38 Determine if there is a significant difference in the effectiveness of these toothpastes in preventing cavities. Select the appropriate conclusion. Select one: a. At an alpha of 0.18 there is NOT a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are independent. b. At an alpha of 0.18 there is a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are not independent. c. At an alpha of 0.25 there is NOT a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are independent. d. At an alpha of 0.05 there is a significant difference in the effectiveness of these three brands of toothpastes. Brand and cavities are not independent. Brand A Brand B Brand C # of New Cavitties 0-1 3-Feb 4 or more 50 28 22 41 30 29 39 23 38