Martin is conducting an experiment. His first test gives him a yield of 5.2 grams. His second test gives him a yield of 1.3 grams. His third test gives him a yield of 8.5 grams. On average, his yield is 5.0 grams, which is close to the known yield of 5.1 grams of substance. Which of the following are true?

His results are accurate but not precise.

Your question is not complete, it seems to be missing the following information;

"A His results are accurate but not precise.

B His results are neither accurate nor precise.

C His results are both accurate and precise.

D His results are precise but not accurate."

The given parameters;

Each of the measurement is far from each other. That is 5.2 grams, 1.3 grams and 8.5 grams are all far apart. So this measurement is not precise.

The known average (5.1 g) and the measured average (5.0 g) are close to each other, so the measurement is accurate.

Thus, we can conclude that his results are accurate but not precise.

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the answer is a. hope this .