1. Warm up 1) Find the mean, median, and mode. 12, 8, 7, 5, 1, 0, 17, 5, 3, 17, 5 2) Find the mean, median, and mode. Interval Class Mark Freqxf 0 – 4 5 – 9 10 – 14 15 – 19 20 – 24 32615

2. What is variation? It is the spread of the numbers around the mean.

3. Measures of Variation 1. Variance 2. Standard Deviation 3. Average Deviation 4. Range 5. Midrange H – L

4. Measuring V-Span 1. Make a V between your index finger and your middle finger when you spread them as far as possible. 2. Measure to the nearest tenth of a centimeter. Your V-Span = Your V-Span = 3. Compute the group’s mean V-Span. Mean V-Span = Mean V-Span = 4. Now fill out the following chart with your data and find the five values of variation

5. xx-mean (x-mean) 2 |x-mean|

6. NASCAR TIME NASCAR TIME - link NASCAR TIME On a separate sheet of paper, and one per person – NEATLY complete the following. On a separate sheet of paper, and one per person – NEATLY complete the following. Find the mean, median, mode, range, midrange, variance, standard deviation, and average deviation of NASCAR points of the top 10 drivers for 2010. Find the mean, median, mode, range, midrange, variance, standard deviation, and average deviation of NASCAR points of the top 10 drivers for 2010.