1. Applied Algebra B Lesson: 3 – 3 Mean, Median, Mode, & Range Objective: Learn to find the mean, median, & mode and range of a set of data.

2. Measures of Central Tendency Mean Average of a set of data. Add up numbers divide by the amount of numbers Median Middle number when arranged in numerical order Mode Number that occurs the most

3. Find the mean, median, & mode 19, 21, 18, 17, 18, 22, 46 6.7, 4.9, 2.5, 1.5, 1.5, 1.2, 0.8, 0.6, 0.4, 0.4 20.5 / 10 Mean = 2.05 161 / 7 Mean = 23 17, 18, 18, 19, 21, 22, 46 Median = 19 Mode = 18 0.4, 0.4 0.6, 0.8, 1.2, 1.5, 1.5, 2.5, 4.9, 6.7 Median = 1.35Mode =0.4 & 1.5

4. Find mean, median, & mode 1295 / 14 Mean = 92.5Median = 92Mode = 82

5. Measures of Variation A measure that describes the spread of the values in a set of data. Range – the difference between the greatest and least value

6. Find the range 19, 21, 18, 17, 18, 22, 46 4, 6, 12, 5, 8 Range: 29 46 – 17 = 29 12 – 4 = 8 Range: 8 13 – 10 = 3 Range: 3

7. Terminology Univariate – 1 variable being measured. Gender Categorical – different categories Man or women Bivariate – 2 variables being measured If asked for gender and age Measurement – different ways to show age Suppose a person tracks the number of men and women who walk into a theater.

8. Homework Pg. 107 1 – 15 all, 16 – 40 EOE