For 20 days you count the number of cars in the school parking lot at the end of the day. You find the mean number of cars is 8.5. Calculate the mean absolute deviation of the data. Use pencil and paper. Find the mean of the deviations without doing any calculations. Explain how this indicates why you should use the mean of the absolute deviations instead.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem