Compare two groups using the mean or median
Grade 7 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.
Ari grew bean plants in sun and in shade, then measured them in centimeters. No plant complained about its spot. How much greater is the median for the sun plants than for the shade plants?
Bo counted jump rope jumps in 30 seconds for two classes. One rope got tangled in a very dramatic way. How much greater is the median for the morning class than for the afternoon class?
Two dot plots of jump rope jumps in 30 seconds on one number line from 25 to 45, a tick at every whole number. Each dot is one student. Top plot, afternoon class: 28, 30, 33, 35, 41. Bottom plot, morning class: 31, 34, 36, 38, 39. The middle dot of each plot is circled: morning class at 36, afternoon class at 33. Two dot plots of jump rope jumps in 30 seconds on one number line from 25 to 45, a tick at every whole number. Each dot is one student. Top plot, afternoon class: 28, 30, 33, 35, 41. Bottom plot, morning class: 31, 34, 36, 38, 39. The middle dot of each plot is circled: morning class at 36, afternoon class at 33. afternoon class 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 morning class 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Each dot is one student. The middle dot of each plot is circled: morning class at 36, afternoon class at 33. Players on two teams each took 20 free throws, and Esme plotted the shots made. The hoop needed a nap. How much greater is the median for the red team than for the blue team?
Two dot plots of free throws made out of 20 on one number line from 5 to 20, a tick at every whole number. Each dot is one player. Top plot, red team: 9, 11, 12, 14, 15, 16, 18. Bottom plot, blue team: 7, 8, 10, 11, 12, 13, 14. The middle dot of each plot is circled: red team at 14, blue team at 11. Two dot plots of free throws made out of 20 on one number line from 5 to 20, a tick at every whole number. Each dot is one player. Top plot, red team: 9, 11, 12, 14, 15, 16, 18. Bottom plot, blue team: 7, 8, 10, 11, 12, 13, 14. The middle dot of each plot is circled: red team at 14, blue team at 11. red team 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 blue team 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Each dot is one player. The middle dot of each plot is circled: red team at 14, blue team at 11. Kira timed how long members of two book clubs read at lunch. Sandwiches were eaten with one hand. How much greater is the mean for the mystery club than for the comic club?
Two dot plots of minutes of reading at lunch on one number line from 14 to 30, a tick at every whole number. Each dot is one member. Top plot, mystery club: 18, 22, 25, 27, 28. Bottom plot, comic club: 16, 19, 20, 23, 27. Each plot has five dots. The mystery club dots add up to 120; the comic club dots add up to 105. Two dot plots of minutes of reading at lunch on one number line from 14 to 30, a tick at every whole number. Each dot is one member. Top plot, mystery club: 18, 22, 25, 27, 28. Bottom plot, comic club: 16, 19, 20, 23, 27. Each plot has five dots. The mystery club dots add up to 120; the comic club dots add up to 105. Minutes of reading at lunch mystery club 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 comic club 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Each dot is one member. Each plot has five dots. The mystery club dots add up to 120; The comic club dots add up to 105. Luz measured the sunflowers in two school gardens, in inches. The tallest one now looks down on everybody. How much greater is the mean for the north garden than for the south garden?
Two dot plots of heights in inches on one number line from 45 to 65, a tick at every whole number. Each dot is one sunflower. Top plot, south garden: 47, 50, 53, 55, 57, 60, 63. Bottom plot, north garden: 52, 55, 57, 58, 60, 62, 62. Each plot has seven dots. The north garden dots add up to 406; the south garden dots add up to 385. Two dot plots of heights in inches on one number line from 45 to 65, a tick at every whole number. Each dot is one sunflower. Top plot, south garden: 47, 50, 53, 55, 57, 60, 63. Bottom plot, north garden: 52, 55, 57, 58, 60, 62, 62. Each plot has seven dots. The north garden dots add up to 406; the south garden dots add up to 385. Heights in inches south garden 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 north garden 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Each dot is one sunflower. Each plot has seven dots. The north garden dots add up to 406; The south garden dots add up to 385. Pia measured fallen oak and maple leaves in centimeters. A squirrel watched closely. How much greater is the median for the oak leaves than for the maple leaves?
Two dot plots of lengths in centimeters on one number line from 5 to 18, a tick at every whole number. Each dot is one leaf. Top plot, oak leaves: 9, 11, 12, 13, 13, 15, 16. Bottom plot, maple leaves: 7, 8, 9, 10, 12, 13, 14. Two dot plots of lengths in centimeters on one number line from 5 to 18, a tick at every whole number. Each dot is one leaf. Top plot, oak leaves: 9, 11, 12, 13, 13, 15, 16. Bottom plot, maple leaves: 7, 8, 9, 10, 12, 13, 14. Lengths in centimeters oak leaves 5 6 7 8 9 10 11 12 13 14 15 16 17 18 maple leaves 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Each dot is one leaf. Ren timed class pet snails crawling on a wet board and a dry board. One dry-board snail zoomed. How much greater is the median for the wet-board snails than for the dry-board snails?
Two dot plots of centimeters crawled in one minute on one number line from 0 to 15, a tick at every whole number. Each dot is one snail. Top plot, dry-board snails: 2, 3, 5, 6, 13. Bottom plot, wet-board snails: 6, 8, 9, 11, 12. Two dot plots of centimeters crawled in one minute on one number line from 0 to 15, a tick at every whole number. Each dot is one snail. Top plot, dry-board snails: 2, 3, 5, 6, 13. Bottom plot, wet-board snails: 6, 8, 9, 11, 12. Centimeters crawled in one minute dry-board snails 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 wet-board snails 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Each dot is one snail. On a field trip, Tala counted the apples each student picked at two orchards. Every bag was very full. How much greater is the median for the hill orchard than for the valley orchard?
Two dot plots of apples picked on one number line from 12 to 30, a tick at every whole number. Each dot is one student. Top plot, hill orchard: 18, 20, 21, 23, 24, 26, 27. Bottom plot, valley orchard: 14, 16, 17, 19, 22, 24, 25. Two dot plots of apples picked on one number line from 12 to 30, a tick at every whole number. Each dot is one student. Top plot, hill orchard: 18, 20, 21, 23, 24, 26, 27. Bottom plot, valley orchard: 14, 16, 17, 19, 22, 24, 25. Apples picked hill orchard 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 valley orchard 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Each dot is one student. Two classes built block towers, and Zee counted the blocks in each tower. One tower leaned like it was listening. How much greater is the range for the first class than for the second class?
Two dot plots of tower heights in blocks on one number line from 10 to 25, a tick at every whole number. Each dot is one tower. Top plot, first class: 12, 15, 17, 20, 24. Bottom plot, second class: 14, 15, 17, 18, 21. Two dot plots of tower heights in blocks on one number line from 10 to 25, a tick at every whole number. Each dot is one tower. Top plot, first class: 12, 15, 17, 20, 24. Bottom plot, second class: 14, 15, 17, 18, 21. Tower heights in blocks first class 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 second class 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Each dot is one tower. Two drum clubs played a rhythm game, and Bo plotted each player's points. The drums were very happy. How much greater is the range for the morning club than for the lunch club?
Two dot plots of points in a rhythm game on one number line from 30 to 50, a tick at every whole number. Each dot is one player. Top plot, morning club: 31, 35, 38, 42, 46, 47, 49. Bottom plot, lunch club: 33, 36, 38, 39, 41, 43, 44. Two dot plots of points in a rhythm game on one number line from 30 to 50, a tick at every whole number. Each dot is one player. Top plot, morning club: 31, 35, 38, 42, 46, 47, 49. Bottom plot, lunch club: 33, 36, 38, 39, 41, 43, 44. Points in a rhythm game morning club 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 lunch club 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Each dot is one player.