Notice the differences between each data set and the measures of Central Tendency and those of Variability. Describe the main differences: 3. Central Tendency: a. Which month had the highest spending? b. Which month had the lowest spending? 4. Variability: a. Which month is more consistent (hint: look at the standard deviation and compare them)? b. Which month is most different?

2. These are a sample of how much each person spent on music throughout the year. Fill in the blank boxes with calculations and be sure to show your work. Person anuary A Feb 90 Mar 250 April B 210 105 229 100 200 78 120 D 221 405 96 200 E 215 402 120 180 314 389 105 G 380 150 390 110 185 H 320 300 97 187 I 309 350 80 401 215 115 415 403 240 SUM: 400 996 350 N: 3.042 3,461 1,927 Mode: Median: (N+1/2 OR NK/100 for position) Mean: (Sum of X / N) Range (High - Low) Variance ($2): SD' = E(X - M)2 N Standard Deviation (s or sd): (Square root of s2)