16Hit1600
Information and IdeasVery hardSelecting the data that distinguish two explanations

Information and Ideas practice question

A school compared two classes' test results before and after one class switched to a new textbook. Class | Before | After Class A (new book) | 62 | 71 Class B (old book) | 61 | 69 A teacher cautions that the new book's effect is unproven, noting that ____

Which choice most effectively uses data from the table to complete the statement?

  1. A. Class B, which kept the old book, improved by 8 points, nearly as much as Class A's 9.Correct
  2. B. Class A improved from 62 to 71.
  3. C. Class A scored 71 after.
  4. D. both classes started at about 60.

Answer: A. Class B, which kept the old book, improved by 8 points, nearly as much as Class A's 9.

A 9-point gain against an 8-point gain without the book: little to credit the book with.

Why the other answers are wrong

B. Class A improved from 62 to 71.
Class A's gain alone suggests the book worked.
C. Class A scored 71 after.
One figure.
D. both classes started at about 60.
True, but shows nothing about the effect.

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