You have carried out five separate titrations to determine the concentration of

Question

You have carried out five separate titrations to determine the concentration of a sodiurn hydroxide solution, and obtained the following values: 0.0285, 0.0290, 0.0282, 0.0306, 0.0288 M. Calculate the Q value for the highest and lowest values in this set of measurements. Number Number high Comparing these Q values to the critical value (Qc) for the Q-test, can either of these values be rejected as an outlier at the 95% confidence level? O O O Reject Qhigh as an outlier. Reject Qlow as an outlier. Neither value can be rejected.

Explanation / Answer

For the given data set,

Q(high) = (0.0306 - 0.0288)/0.0003

             = 6

Q(low) = (0.0285 - 0.0282)/0.0003

             = 1.0

Comparing with Qc, with 95% confidence level we can say that,

Reject Qhigh as an outliner.

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

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