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.

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

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

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

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

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

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.

Homework Pg – 15 all, 16 – 40 EOE