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Question
QuickView
Choices
Curve Question
Difficulty
Psg/Game/S
Difficulty
Explanation
PT86 S4 Q15
+LR
Parallel flawed method of reasoning +PF
A
0%
146
B
92%
162
C
3%
155
D
1%
152
E
4%
155
128
138
147
+Easier 147.181 +SubsectionMedium

In the video, I showed one way in which a small increase in average could have resulted in a large increase in the proportion of obese children. There are other ways too.

Here's one of those ways. Even if everyone gained exactly one pound, it may be the case that there were so many previously-almost-obese-children (within 1lb of obesity) or so few previously-obese children that the one pound gain increases the obese proportion dramatically.

Here's another. A lot of kids could have lost weight. To compensate for those kids losing weight, we'd have to have a lot of kids gaining weight to increase the total average by 1lb. Those kids that gain weight could be the large increase in obese children. If you're statistically inclined, think of it this way. Assume weight is normally distributed. Flatten the curve in the middle and shift the entire curve 1lb to the right. You would get substantially more obese children with a substantial flattening of the curve.