Question 21 Answer and Explanation _ACT 1999 Form 54D Science Section

21. Is the conclusion that Kit A is more accurate than Kit B for estimation of NH₃ concentration supported by the results in the table?

A. Yes, because the estimates using Kit A are consistently lower than the estimates using Kit B.

B. Yes, because the estimates using Kit A are more similar to the estimates using the Standard Method than the estimates using Kit B.

C. No, because the estimates using Kit B are consistently higher than the estimates using Kit A.

D. No, because the estimates using Kit B are more similar to the estimates using the Standard Method than the estimates using Kit A.

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Locate to the NH3 row in the table, and find that the concentration measured by Kit B is always closer to that obtained by the Standard Method. It is mentioned in the beginning that the Standard Method is very accurate, so Kit B is relatively more accurate than A. So the title is wrong, choose D