3. What percentage of the data falls within 1 standard deviation of the mean, 2 standard deviations of the mean, and s standard deviations of mean? [SK] 4. Identify the bias in each of the following, explain what that type of bias is and suggest how it might be avoided: [67) a. A survey asks a group of children whether or not they should be allowed unlimited amounts of junk food. b. Every fourth person entering a public library is asked: "Do you think Carol Shields should receive the Giller prize for her brilliant and critically acclaimed new novel?" 5. Given the data for house sales in a month for a given salesperson for the past 16 months: 6, 5, 7, 6, 8, 3, 5, 4, 6, 7, 5, 9. 5, 6. 6. a. Determine the mean, median, and mode for the data. (sKJ b. Which measure of central tendency best describes these data? Explain your reasoning. [2T] Describe two situations where the mode would be the most appropriate measure of central tendency. [2T] 9