For a dataset with extreme outliers, which measure of central tendency is LEAST affected?
A. Median
B. Arithmetic mean
C. Mode
D. Geometric mean
Answer: Option A
Solution (By JKSSB Mock Tests)
The median depends only on the middle value(s) in an ordered list, making it robust to extreme values, whereas the mean incorporates all values and can be heavily distorted by outliers.
Explanation:
Pre-testing a questionnaire with a small pilot group helps detect unclear wording, logical flaws, or response issues, ensuring the instrument is valid and reliable for the main survey.
Consider the following: 1. CPI-IW is compiled by Labour Bureau. 2. CPI-Rural, Urban, Combined base year is 2012. 3. CPI basket includes both goods and services. Which of the above is/are correct?
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