A newly established company claims that it has the analysis system for determina

Question

A newly established company claims that it has the analysis system for determination of lipid in food sample that is more precise than the standard gas chromatography (GC) system. To prove this, the company analyzed a standard lipid solution (5 ppb) using both the new system and standard GC, 10 times each. The mean ± SD obtained from the new and the standard system are 4.72 ± 0.17 ppb and 4.80 ± 0.25 ppb, respectively. The new system did show lower standard deviation, but the value seems close to that of the GC technique. Use a suitable statistical equation to prove whether or not the precision of the new system is better than that of GC.

Explanation / Answer

Precision is how close a measurement comes to another measurement. Precision is determined by a statistical method called a standard deviation. Standard deviation is how much, on average, measurements differ from each other. High standard deviations indicate low precision, low standard deviations indicate high precision. The new system has an SD of 0.17 and the GC system has an SD of 0.25, therefore, based on the SD value it can be said that the precision of the new system is better than the GC system.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.