Obiective: Describe data, using measures of variation, such as the range, variance, and standard deviation. To describe a data set accurately, we need more than just measures of central tendency. Measures of variability measure how spread out the data values are The range (R) is the difference between the highest and lowest values. 1. Listed below are the top ten annual salaries (in Millions of dollars) of TV personalities. Find the range. 37.2 36.9 35.6 27.2 15.5 14 9 8.9 11.6 10.1 2. Students in a class were asked on a questionnaire at the beginning of the course, "How many children do you think is ideal for a family?" The observations, classified by student's gender, were Men: 0 0 0 2 4 Women: 0 2 2 2 2 2 4 a) Find the mean and range for each data set. 4 4 b) Do the distributions of data have the same amount of variability? If not, which distribution has more variability