Tax-Exempt Properties A tax collector wishes to see if the mean values of the tax-exempt properties are different for two cities. The values of the tax-exempt properties for the two samples are shown. The data are given in millions of dollars. A a _ 0.05, is there enough evidence to support the tax collectors claim that the means are different? City A City B 113 22 14 8 82 11 5 15 25 23 23 30 295 50 12 9 44 11 19 7 12 68 81 2 31 19 5 2 20 16 4 5

Statistics Week 4 Aids to the Interpretation of Box Plots 1. The line (median) inside the box represents the “center” of the distribution of data. S= {1, 3, 5, 6, 10, 12, 68} Median: 6 Q U : 12 QL : 3 *IQR= Inner Quartile Range= QU−Q L 2. Examine the length of the box. The IQR is a measure of the sample’s variability and is especially...