Repeated measurement of Pb in a lake water sample gave 3.2, 5.2 and 7.2\,ppb of Pb. Standard deviation in the measurement of Pb is

ABC26PH0050 · Data Analysis

Subject: Physical Chemistry · Chapter: Data Analysis · Topic: Error Propagation · Exam: CSIR-NET DEC 2017 · Marks: 2 · Difficulty: Medium

Repeated measurement of $Pb$ in a lake water sample gave $3.2, 5.2$ and $7.2\,\mathrm{ppb}$ of $Pb$. Standard deviation in the measurement of $Pb$ is

(a)$2\,\mathrm{ppb}$

(b)$4\,\mathrm{ppb}$

(c)$0\,\mathrm{ppb}$

(d)$\sqrt{2}\,\mathrm{ppb}$

Answer

Answer (as printed): A

Explanation

No explanation was printed for this question.