What is the approximate average volume per vacutainer in this dataset?

What is the approximate average volume per vacutainer in this dataset?

• A. 8.6 cc
• B. 8.0 cc
• C. 9.0 cc
• D. 8.9 cc

Answer: (A)

Mean value is found by adding all vacutainer volumes and dividing by how many samples you have. In this dataset the measurements cluster around the mid-8 mL range, with values near 8.4–8.8 mL and only a few a bit lower or higher. When you average all those numbers, the balance point comes out to about 8.6 cc. That’s the best estimate for the average volume. If most measurements were consistently at 8.0 or 9.0, the mean would move toward those values, but the observed spread centers around 8.6.

Mean value is found by adding all vacutainer volumes and dividing by how many samples you have. In this dataset the measurements cluster around the mid-8 mL range, with values near 8.4–8.8 mL and only a few a bit lower or higher. When you average all those numbers, the balance point comes out to about 8.6 cc. That’s the best estimate for the average volume. If most measurements were consistently at 8.0 or 9.0, the mean would move toward those values, but the observed spread centers around 8.6.