2.4 · Part II
Supported Application · Guided Entry to Today's Problem
Display Data with Box Plots · Box Plot
- 5-Number Summary: Minimum, Lower Quartile (Q1), Median (Q2), Upper Quartile (Q3), Maximum
- Draw the Box: The box spans from Q1 to Q3 and contains the middle 50% of data
- Whiskers: Draw lines from the box out to the minimum and maximum
- Display Data with Box Plots (Representar datos con diagramas de caja) — Show a data set's five-number summary in a box-and-whisker display.
- Box Plot (Diagrama de caja) — A graph that shows how data is spread using five key numbers.
- Median (Mediana) — The middle number when you put them in order.
- Quartile (Cuartil) — Numbers that split the data into four equal parts.
- Interquartile Range (Rango intercuartílico) — The spread of the middle half of the data (Q3 − Q1).
- Data distribution (Distribución de datos) — How the data looks: where it sits and how spread out it is.
- A common mistake in Display Data: Box Plots is treating a quartile as just one data point instead of the median of a half — for the lower half 4, 8, 10, 14, some students pick 10 (the last value) as Q1 instead of finding the median of that half: Q1 = (8 + 10) ÷ 2 = 9. A second common slip is finding IQR by adding the quartiles instead of subtracting, writing IQR = Q3 + Q1 (like 30 + 18 = 48) instead of IQR = Q3 − Q1 (30 − 18 = 12) — always order the data first, then subtract Q1 from Q3 to find the spread of the middle 50%.
-
1 MULTIPLE CHOICE
Find the range of: 14, 22, 8, 31, 17
- A23
- B31
- C8
- D18
Put the data in orderWork- 1OrderSmallest to largest.
- 2CountHow many values?
- 3LocateMiddle, or add and divide.
- 4AnswerSay which measure it is.
-
2 GUIDED FILL
Build a five-number summary for 2, 4, 5, 7, 8.
- 1Minimum and maximum: ___.
- 2Median: ___.
- 3Write min, Q1, median, Q3, max: ___.
Final answer: -
3 GUIDED FILL
Build a five-number summary for 3, 5, 6, 8, 9.
- 1Minimum and maximum: ___.
- 2Median: ___.
- 3Write min, Q1, median, Q3, max: ___.
Final answer:
Writing Task: Justify why your mathematical solution is accurate and complete.
2.4 · Part II
On-Level Application · Standard Rigor
Display Data with Box Plots · Box Plot
- 5-Number Summary: Minimum, Lower Quartile (Q1), Median (Q2), Upper Quartile (Q3), Maximum
- Draw the Box: The box spans from Q1 to Q3 and contains the middle 50% of data
- Whiskers: Draw lines from the box out to the minimum and maximum
- Display Data with Box Plots (Representar datos con diagramas de caja) — Show a data set's five-number summary in a box-and-whisker display.
- Box Plot (Diagrama de caja) — A graph that shows how data is spread using five key numbers.
- Median (Mediana) — The middle number when you put them in order.
- Quartile (Cuartil) — Numbers that split the data into four equal parts.
- Interquartile Range (Rango intercuartílico) — The spread of the middle half of the data (Q3 − Q1).
- Data distribution (Distribución de datos) — How the data looks: where it sits and how spread out it is.
- A common mistake in Display Data: Box Plots is treating a quartile as just one data point instead of the median of a half — for the lower half 4, 8, 10, 14, some students pick 10 (the last value) as Q1 instead of finding the median of that half: Q1 = (8 + 10) ÷ 2 = 9. A second common slip is finding IQR by adding the quartiles instead of subtracting, writing IQR = Q3 + Q1 (like 30 + 18 = 48) instead of IQR = Q3 − Q1 (30 − 18 = 12) — always order the data first, then subtract Q1 from Q3 to find the spread of the middle 50%.
-
1 MULTIPLE CHOICE
Two box plots show: Team A has IQR = 8, Team B has IQR = 22. What does this tell you?
- ATeam A's middle 50% is more consistent; Team B's is more spread out
- BTeam B is a better team
- CTeam A has a higher median
- DThe IQRs don't tell you about consistency
✏️ Workspace & Solution Steps
-
2 MULTIPLE CHOICE
The Hawks' points per quarter are 2, 4, 5, 7, 8, 10, 12. Resting on the scoreboard, what are the minimum, median, and maximum?
- AMinimum 2, median 7, maximum 12
- BMinimum 2, median 5, maximum 12
- CMinimum 0, median 7, maximum 12
- DMinimum 2, median 8, maximum 10
✏️ Workspace & Solution Steps -
3 MULTIPLE CHOICE
The Comets scored 6, 10, 14, 18, 22, 26, 30, 34 across 8 games. After ordering, what are Q1 and Q3?
- AQ1 = 12, Q3 = 28
- BQ1 = 10, Q3 = 30
- CQ1 = 14, Q3 = 26
- DQ1 = 20, Q3 = 34
✏️ Workspace & Solution Steps
Writing Task: Justify why your mathematical solution is accurate and complete.
2.4 · Part II
Extension & Non-Routine Application
Display Data with Box Plots · Box Plot
- 5-Number Summary: Minimum, Lower Quartile (Q1), Median (Q2), Upper Quartile (Q3), Maximum
- Draw the Box: The box spans from Q1 to Q3 and contains the middle 50% of data
- Whiskers: Draw lines from the box out to the minimum and maximum
- Display Data with Box Plots (Representar datos con diagramas de caja) — Show a data set's five-number summary in a box-and-whisker display.
- Box Plot (Diagrama de caja) — A graph that shows how data is spread using five key numbers.
- Median (Mediana) — The middle number when you put them in order.
- Quartile (Cuartil) — Numbers that split the data into four equal parts.
- Interquartile Range (Rango intercuartílico) — The spread of the middle half of the data (Q3 − Q1).
- Data distribution (Distribución de datos) — How the data looks: where it sits and how spread out it is.
- A common mistake in Display Data: Box Plots is treating a quartile as just one data point instead of the median of a half — for the lower half 4, 8, 10, 14, some students pick 10 (the last value) as Q1 instead of finding the median of that half: Q1 = (8 + 10) ÷ 2 = 9. A second common slip is finding IQR by adding the quartiles instead of subtracting, writing IQR = Q3 + Q1 (like 30 + 18 = 48) instead of IQR = Q3 − Q1 (30 − 18 = 12) — always order the data first, then subtract Q1 from Q3 to find the spread of the middle 50%.
-
1 MULTIPLE CHOICE
A box plot has a 5-number summary of minimum 4, Q1 = 8, median 12, Q3 = 18, maximum 24. What is the interquartile range?
- A10
- B20
- C6
- D12
Put the data in orderWork
Writing Task: Justify why your mathematical solution is accurate and complete.