Question 1161378: The cafeteria manager at a middle school wanted to keep track of how many student breakfast and lunches were sold on a Monday.
Which information matrix would be the most appropriate to show this data?
A.
B.
C.
D.
The question is provided in the link here: https://i.imgur.com/WDlMuZI.png
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website!
Answer: Choice B (not the second answer choice; the fourth one)
Why is this? Note how this is the only answer choice in which the grade levels 6, 7, 8 are not part of the inside matrix. Rather they are simply labels for the rows.
Imagine we had two schools with identical sets of information. In other words, imagine we had 2 of these matrices. Adding the matrices would result in adding each corresponding entry (eg: adding two copies of the 24 sixth graders who bought breakfast). It does not make any sense to add the grade levels together. We wouldn't add 6+6 = 12, as there are no 12th graders to be found in this data set. The labels stay as they are.
So again only choice B has the proper structure as described. Also, the values are in the correct spots, such as 24 sixth graders who bought breakfast, 168 of the same grade level that bought lunch, etc. In essence, you are distilling the initial bulleted list into numerical values only (more or less), keeping the same order/structure.
Side note: it might help to think of the information matrix as a spreadsheet. Just imagine the grid/box lines aren't visible to separate each cell.
Another side note: this is probably a bit nitpicky, but it's a bit confusing/annoying when they present multiple choice answers out of alphabetical order. Of course, it's easy to overcome, just be cautious about things like this.
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