A doctor is measuring children's heights to the nearest ½ inch and obtains scores such as 40.0,40.5,41.0,and so on.What are the real limits for a score of X = 42?
A)41 and 43
B)41.5 and 42.5
C)41.75 and 42.25
D)41.25 and 42.75

Question

Quizplus · Accepted Answer

The real limits for a score of X = 42, when measuring to the nearest ½ inch, are 41.75 and 42.25. This accounts for the range that rounds to 42 when measuring to the nearest half inch, meaning anything from just above 41.5 up to but not including 42.5.

A Doctor Is Measuring Children's Heights to the Nearest ½