Review Check to see if the ordered pair is a solution or not to X + y < -1 (-3,-1) (0,2) Solve and graph 2x + 3y > 12

6.6 stem/leaf plots and mean, median, and mode

Notes Measure of Central Tendency: describe the center of data. Mean: average add all #’s # of items BEST: NO OUTLIERS 3, 5, 2, 5, 2, 3, 1

Median Notes 3, 8, 2, 3, 8, 3, 10 11, 21, 43, 1, 5, 9 Median: middle number. Must be least to greatest. If two numbers, add and divide by 2 BEST: NO OUTLIERS; NO BIG GAPS IN MIDDLE OF NUMBERS

Mode Notes Mode: most occurring numbers. BEST: MANY REPEATED NUMBERS 3, 4, 5, 3, 5, 6, 8, 3, 8

Find Mean 4, 5, 9, 3, 4, 8, 10, 3 10, 11, 4, 30, 45

Find Median 1, 5, 6, 8, 10, 7, 8, 9 5, 8, 9, 1, 2, 5, 7

Find Mode 12, 11, 10, 9, 8, 11, 15 1, 1, 8, 9, 8, 12, 5, 6, 7

Information stem/leaf Stem/leaf plot: display data by digits. Stem: 1st digits Leaf: last digit Ex: 34 3 is the stem 4 is the leaf To make: Create key Draw graph, i.d. stem and leaf Put stems in order

Stem Leaf plot 23, 25, 45, 21, 54, 60, 68, 49, 52 234, 245, 257, 249, 307, 238, 240, 265

Stem/Leaf plot 17, 11, 25, 58, 96, 28, 11, 19, 20 , 31 170, 152, 179, 182, 193, 158, 149, 160

Wrap up Questions/Comments Hw: worksheet