1. Do Now 1/31/12 Take out HW from last night. Take out HW from last night. –Text p. 278, #1-13 all, #20 & 21 Copy HW in your planner. Copy HW in your planner. –Text p. 282, #1-14 all, 18 & 19 In your journal, explain how you find the median of a set of data. Then find the median of the following set of numbers. In your journal, explain how you find the median of a set of data. Then find the median of the following set of numbers. 27, 6, 8, 13, 10, 14, 16, 18, 25, 20, 20, 3

2. Homework Text p. 278, #1-13 all, #20 & 21 1) 20; 20; 5 and 20; 30 2) 55; 54; 48; 24 3) Median; there is an outlier that skews the data 4) 12; Adding the outlier increased the mean by 1. The median and the mode did not change; median; mean. 5) 83.3; 88; 88; 28 6) 15.9; 14.5; 15; 40 7) 4.3; 4.4; 4.4 and 6.2; 4.28 8) 9.15; 7.9; 3.9; 13.2 9) Mean and median; the mode focuses on one data value and does not reflect the data set as a whole. 9) 10) 5; adding the outlier decreased the mean and the median by 1.5. The mode did not change; mean; median. 11) 151; adding the outlier increased the mean by 10 and the median by 7.5. The mode did not change because there was no mode; median; mean. 12) 67 in. 13) 9; 8; 12; adding the outlier increased the mean by 1 20) B 21) J

3. Objective SWBAT organize data with box-and- whisker plots. SWBAT organize data with box-and- whisker plots.

4. Section 7.2 “Box-and-Whisker Plots” Box-and-whisker plots- –U–U–U–Uses the MEDIAN of a set of data. The “FIVE” points of a box-and-whisker plot –(–(–(–(1) Find the SMALLEST number. –(–(–(–(2) Find the GREATEST number. –(–(–(–(3) Find the MEDIAN of the whole set – SECOND QUARTILE –(–(–(–(4) Find the MEDIAN of the numbers below the SECOND QUARTILE - FIRST QUARTILE –(–(–(–(5) Find the MEDIAN of the numbers above the SECOND QUARTILE – THIRD QUARTILE

5. Draw a box-and-whisker plot for the following set of data. Find the “FIVE” points of a box-and-whisker plot –(–(–(–(1) Find the SMALLEST number. –(–(–(–(2) Find the GREATEST number. 27, 6, 8, 13, 10, 14, 16, 18, 25, 20, 20, 3 3, 6, 8, 10, 13, 14, 16, 18, 20, 20, 25, 27 3 27

6. Draw a box-and-whisker plot for the following set of data. –(–(–(–(3) SECOND QUARTILE- Find the MEDIAN of the whole set – 3, 6, 8, 10, 13, 14, 16, 18, 20, 20, 25, 27 15 (14 + 16) ÷ 2= 15 Greatest Smallest

7. Draw a box-and-whisker plot for the following set of data. –(–(–(–(4) FIRST QUARTILE – Find the MEDIAN of the numbers below (smaller than) the SECOND QUARTILE 3, 6, 8, 10, 13, 14, 16, 18, 20, 20, 25, 27 15 (8 + 10) ÷ 2= 9 Second quartile 9 First quartile Greatest Smallest

8. Draw a box-and-whisker plot for the following set of data. –(–(–(–(5) THIRD QUARTILE Find the MEDIAN of the numbers above (more than) the SECOND QUARTILE – 3, 6, 8, 10, 13, 14, 16, 18, 20, 20, 25, 27 15 (20 + 20) ÷ 2= 20 Second quartile 9 First quartile 20 Third quartile Greatest Smallest

9. Draw a box-and-whisker plot for the following set of data. –P–P–P–Plot the FIVE points on a number line. 3, 6, 8, 10, 13, 14, 16, 18, 20, 20, 25, 27 15 Second quartile 9 First quartile 20 Third quartile Greatest Smallest 15202739 –D–D–D–Draw the box-and-whisker plot. 15202739

10. Try it out… Draw a box-and-whisker plot for the following set of data. 2, 3, 9, 12, 16, 16, 18, 20, 23, 25, 26, 28, 32, 35 19 Second quartile 12 First quartile 26 Third quartile GreatestSmallest 1926 235 12

11. the difference between the lower and upper quartiles. Interquartile Range 1926 235 12 26 - 12 = 14

12. Comparing Box-and-Whisker Plots 64 66 68 70 72 74 76 78 80 82 84 86 Heights of Basketball and Baseball Players (in.) Basketball Players Baseball Players The box-and-whisker plots below shows the heights of basketball players and baseball players in inches. Which set of heights of players has a greater median? The median height of basketball players, about 74 inches, is greater than the median height of baseball players, about 70 inches.

13. Comparing Box-and-Whisker Plots 64 66 68 70 72 74 76 78 80 82 84 86 Heights of Basketball and Baseball Players (in.) Basketball Players Baseball Players The box-and-whisker plots below shows the heights of basketball players and baseball players in inches. Which players have a greater interquartile range? The basketball players have a longer box, so they have a greater interquartile range.

14. Comparing Box-and-Whisker Plots 64 66 68 70 72 74 76 78 80 82 84 86 Heights of Basketball and Baseball Players (in.) Basketball Players Baseball Players The box-and-whisker plots below shows the heights of basketball players and baseball players in inches. Which group of players has more predictability in their height? The range and interquartile range are smaller for the baseball players, so the heights for the baseball players are more predictable.

15. Use the box-and-whisker plots below to answer each question. 20 24 26 28 30 32 34 36 38 40 42 44 t Number of Shoes Sold in One Week at Each Store Maroon’s Shoe Store Sage’s Shoe Store Comparing Box-and-Whisker Plots Which shoe store has a greater median? Which shoe store has a greater interquartile range? Which shoe store appears to be more predictable in the number of shoes sold per week?

16. NJASK7 Prep Text p. 282, #1-14 all, 18 & 19 Homework