A nephew visits his Aunt Tess for five days. Every morning he weighs himself, and the five readings are very different. When he gets home and compares the average from his aunt's scale to the reading on his scale (which he regards as his true weight), he realizes the average is almost exactly the same. As a measure of his weight on his scale, the reading on his aunt's scale is:
A) unbiased and reliable.
B) unbiased and unreliable.
C) 95 percent accurate.
D) biased and unreliable.
E) biased and reliable.

Question

Quizplus · Accepted Answer

The scale is unbiased because the average reading matches his true weight, indicating accuracy over time. However, it's unreliable due to the significant variation in daily readings, showing inconsistency.

A Nephew Visits His Aunt Tess for Five Days