PRC-2 · Chapter 8 · Question 11 of 60
Which of the following statements regarding the statistical measure of 'variance' is universally true?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) Variance is always positive or zero.
Explanation
Because variance is calculated by squaring the deviations from the mean, the result can never be negative. It is always a positive number or exactly zero (if there is no spread).
More Statistical Measures of Data MCQs
- Q13Which measure of central tendency is defined as the value that appears most frequently in a given dataset?
- Q14For a symmetrical (normal) distribution curve, which relationship between the mean, median, and mode is correct?
- Q15The mean of 5 observations is incorrectly recorded as 40. Upon review, it was found that a value of 25 was mistakenly read as 50. What is…
- Q16If a researcher multiplies every single observation in a dataset by exactly 5, what will mathematically happen to the arithmetic mean of…
- Q17If every observation in a statistical sample is divided by 10, how is the new arithmetic mean affected?