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A study was conducted to compare two biology study aids: a new online game and physical flashcards. 80 middle school biology students were selected at random, and their parent(s) chose which study aid their child used. The results showed that the students who used flashcards had significantly better outcomes than students who used the online game. Based on this information, which of the following statements is true?
Choose 1 answer:
(A) Flashcards are a more effective study aid than the online game for all middle school biology students.
(B) The lack of random assignment means there could be other explanations for the study results.
(C) The lack of a control group makes comparing flashcards and the online game impossible.
(D) None of the statements are true.

A study was conducted to compare two biology study aids: a new online game and physical flashcards. $80$ middle school biology students were selected at random, and their parent(s) chose which study aid their child used. The results showed that the students who used flashcards had significantly better outcomes than students who used the online game. Based on this information, which of the following statements is true? $\newline$ Choose $1$ answer: $\newline$ (A) Flashcards are a more effective study aid than the online game for all middle school biology students. $\newline$ (B) The lack of random assignment means there could be other explanations for the study results. $\newline$ (C) The lack of a control group makes comparing flashcards and the online game impossible. $\newline$ (D) None of the statements are true.

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Interpret confidence intervals for population means

Full solution

Q. A study was conducted to compare two biology study aids: a new online game and physical flashcards.

80

middle school biology students were selected at random, and their parent(s) chose which study aid their child used. The results showed that the students who used flashcards had significantly better outcomes than students who used the online game. Based on this information, which of the following statements is true?

\newline

Choose

1

answer:

\newline

(A) Flashcards are a more effective study aid than the online game for all middle school biology students.

\newline

(B) The lack of random assignment means there could be other explanations for the study results.

\newline

(C) The lack of a control group makes comparing flashcards and the online game impossible.

\newline

(D) None of the statements are true.

Study Results Comparison: The study's results show that students using flashcards performed better than those using the online game.
Lack of Random Assignment: However, since the parents chose the study aid, there wasn't random assignment to the two groups.
Influence of Other Factors: Without random assignment, other factors could have influenced the results, like motivation or prior knowledge.
Possible Study Result Explanations: So, the correct answer is that there could be other explanations for the study results because of the lack of random assignment.

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