To solve this problem, we need to understand the definitions of accuracy and precision:
-
Accuracy: How close a measurement is to the true or accepted value.
-
Precision: How close repeated measurements are to each other.
Let's analyze each set of measurements:
1. Kayla
- Measurements: 472, 480, 474, 475, 471
- True value: 500 cm
- Analysis: The measurements are close to each other (precise) but not close to the true value (not accurate).
-
Answer: P
2. Tyrone
- Measurements: 292, 356, 310, 400, 377
- True value: 500 cm
- Analysis: The measurements are neither close to each other nor close to the true value.
-
Answer: N
3. Ralph
- Measurements: 498, 501, 500, 502, 504
- True value: 500 cm
- Analysis: The measurements are very close to each other and also close to the true value.
-
Answer: B
4. Mark
- Measurements: 537, 541, 538, 538, 540
- True value: 500 cm
- Analysis: The measurements are close to each other (precise) but not close to the true value (not accurate).
-
Answer: P
5. Lena
- Measurements: 516, 506, 488, 504, 491
- True value: 500 cm
- Analysis: The measurements are somewhat close to the true value but not very close to each other.
-
Answer: A
6. True value: 45, Measurements: 37, 40, 39, 45, 49, 41
- Analysis: One measurement is exactly the true value, but the others are not very close to each other or the true value.
-
Answer: N
7. True value: 250, Measurements: 244, 249, 251, 248, 252
- Analysis: The measurements are very close to each other and also close to the true value.
-
Answer: B
8. True value: 30, Measurements: 25, 28, 33, 35, 31, 26
- Analysis: The measurements are somewhat close to the true value but not very close to each other.
-
Answer: A
9. True value: 150, Measurements: 187, 165, 134, 177, 142
- Analysis: The measurements are neither close to each other nor close to the true value.
-
Answer: N
Final Answer:
1. P
2. N
3. B
4. P
5. A
6. N
7. B
8. A
9. N
Parent Tip: Review the logic above to help your child master the concept of accuracy and precision worksheet.
