Answer:
Its actually C: between 21 and 30 pounds in shelter A; between 18 and 28 pounds in shelter B
Explanation:
edg2020
Box and whiskerplots work in a way that from min to LQ1 is 25% of the data. From LQ1 to the median, it is 50% of the data. So in shelter A, from 8 to 21, and from 21 to 30, those are the two halfs of that data. for shelter B its 10 to 18 and 18 to 28.
The question is asking for one-half of dogs in each shelter. A is incorrect because 8 to 30 is 100% of dogs in shelter a. B is incorrect because 8 to 17 is only 25%. Though 10 to 16 is shleter b is also 35%, and together they make 50%, the questions asks "IN EACH SHELTER", so B is also incorrect.
D is wrong because it only takes the median to the upper quartile, and that is 25% of the data too.
Therefore the answer is C. Because 21 to 30 is half of shelter A, and 18 to 28 is half of shelter B.
:)