16. Determine if the following variable is quantitative or qualitative categorica The age of students taking a statistics course 17. If a Gatribution is bell-shaped symmetric, then which of the following would best describe the spread of the data set? a) the mean by the standard deviation c) the median d) the IOR 18. Determine if the following variable is quantitative or qualitative/categorical: The number of students taking a course 19. On a factory assembly line, every 100 nem is checked for defects. This is an example of what kind of sampling technique? 20. Ia dataset has a standard deviation of 7, what is the variance for this data set? 21. Which of the following is an example of cluster sampling? al A sample of 100 high school students is randomly chosen to participate in a survey about study habits. Chosen at random, 25 9 graders, 25 10 graders, 25 11 graders and 25 12 graders are Surveyed about their study habits. A list of all the county high schools is made and 2 are randomly chosen. Al students at these two high schools are surveyed about their study habits d) All the high school students living in a 1 mile radius of the school board office are surveyed regarding their study habits 22. Suppose a student receives a score on the ACT in the 17 percentile. What percentage of those taking the ACT scored higher than the student? 23. a data value has a score of 2.3, that means: al is less than the mean b) It is equal to the mean d) it is larger than the mean d) none of these 24. TRUE OR FALSE: The variance could be negative. Explain why. 25. In a survey conducted by the National Center for Health Statistics, the sample mean height of women in the United States (aged 20-29) was 64 inches, with a sample standard deviation of 2.71 inches. Estimate the percentage of the women whose heights are between 58.58 inches and 69.42 inches. (assume the heights follow a bell shaped distribution)