Couple of things to note that can be attacked
1. Avg weight at the age of 3 months
- if we get anything which isn't avg weight, that can be a flaw.
- Also, we are only considered with weight at 3months of age
2. its weight gain has been below the United States average
- where did weight gain come from, can be a flaw
- we only know the range for avg weight. one data point can be outside the range too
(A) Weight is only one measure of normal infant development.
We don't care
(B) Some three-month-old children weigh as much as seventeen pounds.
We don't care, can be true though!
(C) It is possible for a normal child to weigh ten pounds at birth.
We don't care, we are looking for something for 3 month old
(D) The phrase "below average" does not necessarily mean insufficient.
Insufficient for what?
(E) Average weight gain is not the same as average weight.
Yes, this is what we are looking for
mono
The average normal infant born in the United States weighs between twelve and fourteen pounds at the age of three months. Therefore, if a three-month-old child weighs only ten pounds, its weight gain has been below the United States average.
Which of the following indicates a flaw in the reasoning above?
(A) Weight is only one measure of normal infant development.
(B) Some three-month-old children weigh as much as seventeen pounds.
(C) It is possible for a normal child to weigh ten pounds at birth.
(D) The phrase "below average" does not necessarily mean insufficient.
(E) Average weight gain is not the same as average weight.
Is it really different "average weight gain" from "average weight"? What meaning is hidden??