Xylitol has proven effective in preventing dental caries (cavities) when included in food or gum. A total of 75 Peruvian children were given milk with and without Xylitol and were asked to evaluate the taste of each. The researchers measured the children's ratings of the two types of milk. (Source: Castillo JL, et al (2005) Children's acceptance of milk with Xylitol or Sorbitol for dental caries prevention. BMC Oral Health (5)6.) Question 20 1 pt 9 1 0 Details What is the response variable in this experiment? Orating O types of milk O dental cavities O Xylitol Question 21 1 pt 9 1 0 Details What are the treatments? 0 75 children O rating O milk with or without Xylitol O cavities Question 22 1 pt 9 1 0 Details Identify the experimental units. O all Peruvian children O the children given Xylitol O 75 Peruvian children O dental cavities