Julia stands on a pair of scales three times in a row.The first time she weighs 69 kilo,the second time 69 kilo,and the third time 69 kilo.Her real weight is 51 kilo.What is the matter with the scales?
A)The pair of scales is not reliable and not valid.
B)The pair of scales is reliable but is not valid.
C)The pair of scales is not reliable but is valid.
D)The pair of scales is reliable and valid.

Question

Quizplus · Accepted Answer

The scales are reliable as they give the same reading all three times Julia weighs herself. However, they are not valid as they give a weight reading that is significantly higher than Julia's real weight of 51 kilos.

Julia Stands on a Pair of Scales Three Times in a Row.The