1. **State the problem:** We have a dot plot showing the number of candy pieces in individual packs. We need to determine which statement about the data is NOT true.
2. **List the data points from the dot plot:**
- 10 pieces: 3 packs
- 11 pieces: 3 packs
- 12 pieces: 0 packs
- 13 pieces: 2 packs
- 14 pieces: 3 packs
- 15 pieces: 3 packs
- 16 pieces: 2 packs
- 17 pieces: 0 packs
- 18 pieces: 3 packs
- 19 pieces: 0 packs
3. **Calculate the total number of data points:**
$$3 + 3 + 0 + 2 + 3 + 3 + 2 + 0 + 3 + 0 = 19$$
4. **Find the median:**
- The median is the middle value when data is ordered.
- Since there are 19 data points, the median is the 10th value.
- List data in order:
- 10 (3 times): positions 1-3
- 11 (3 times): positions 4-6
- 13 (2 times): positions 7-8
- 14 (3 times): positions 9-11
- The 10th value is in the 14s.
- So, median = 14 pieces.
5. **Check statement A:** "The median is 15 pieces of candy."
- Our calculation shows median = 14, so statement A is false.
6. **Calculate the range:**
- Range = max value - min value
- Max value with dots = 18
- Min value with dots = 10
- Range = 18 - 10 = 8 pieces
- Statement B says range is 8 pieces, which is true.
7. **Calculate the interquartile range (IQR):**
- Q1 is the 25th percentile, position = $\frac{19+1}{4} = 5$th value.
- Q3 is the 75th percentile, position = $3 \times \frac{19+1}{4} = 15$th value.
- Find Q1 (5th value):
- Positions 1-3: 10
- Positions 4-6: 11
- 5th value is 11
- Find Q3 (15th value):
- Positions 9-11: 14
- Positions 12-14: 15
- Positions 15-16: 16
- 15th value is 15
- IQR = Q3 - Q1 = 15 - 11 = 4 pieces
- Statement C says IQR is 5 pieces, which is false.
8. **Calculate the mean:**
- Multiply each value by its frequency and sum:
$$10 \times 3 + 11 \times 3 + 13 \times 2 + 14 \times 3 + 15 \times 3 + 16 \times 2 + 18 \times 3 = 30 + 33 + 26 + 42 + 45 + 32 + 54 = 262$$
- Mean = $\frac{262}{19} \approx 13.79$
- Statement D says mean is 15, which is false.
9. **Conclusion:**
- Statements A, C, and D are false.
- Statement B is true.
- The question asks which statement is NOT represented by the data.
- The first false statement is A.
**Final answer:** Statement A is not represented by the data.
Candy Dot Plot 46F36E
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