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Open Access

Correction

Correction: Additive and Subtractive Scrambling in Optional Randomized Response Modeling

  • The PLOS ONE Staff

There are errors in the fifth paragraph under the “Double response approach” heading of the Proposed Procedures section of this article: The expressions for optimum sample sizes and optimum variance were derived incorrectly. The correct paragraph is:

Consider,

Using Lagrange approach to minimize under the restriction that , we get:and

With these optimum sample sizes, the minimum value of is given by:where .

Reference

  1. 1. Hussain Z, Al-Sobhi MM, Al-Zahrani B (2014) Additive and Subtractive Scrambling in Optional Randomized Response Modeling. PLoS ONE 9(1): e83557

Citation: The PLOS ONE Staff (2014) Correction: Additive and Subtractive Scrambling in Optional Randomized Response Modeling. PLoS ONE 9(6): e101308. https://doi.org/10.1371/journal.pone.0101308

Published: June 19, 2014

Copyright: © 2014 The PLOS ONE Staff. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.