Answer :
Final answer:
Cal's scale reads 67 pounds instead of the correct weight of 76 pounds, indicating a validity issue. Reliability suggests the scale may consistently give the same reading, but validity measures whether it reflects the true weight. Therefore, the scale is 'not valid.'
Explanation:
Understanding Scale Issues
Cal's weight is recorded as 76 pounds, while the scale shows 67 pounds. This inconsistency indicates that there is a problem with the scale. To determine the best description of this issue, it's important to understand the concepts of reliability and validity.
Reliability refers to the consistency of measurements. If the scale consistently shows the same incorrect weight (in this case, 67 pounds), it is reliable but not accurate. However, validity refers to whether the measurement actually reflects the true weight. Since Cal weighs 76 pounds and the scale reads 67, the scale is not valid for measuring weight.
Thus, the best description of the problem with the scale is that it is not valid because it fails to accurately measure Cal's true weight.
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