Find the variance of the data 2, 2, 1, 1, 1, 5 (treat them as a whole population).
Answer and explanation
Correct answer: A.
- Step 1: Mean .
- Step 2: Variance .
Answer
.
Why not the others: : the sample variance (dividing by ) is calculated. : it uses the mean of squares without subtracting the squared mean.
Practise more Data Analysis.
Free questions with an explanation for every one, and full timed EJU Japan mock tests.
More Data Analysis questions
- Find the variance of the data 12, 4, 6, 4, 3, 7 (treat them as a whole population).
- Find the variance of the data 2, 11, 8, 3, 11 (treat them as a whole population).
- Find the median of the data 10, 12, 2, 2, 1, 3.
- Find the median of the data 8, 9, 1, 2, 1, 3.
- Find the variance of the data 12, 1, 3, 3, 6, 4, 2, 9 (treat them as a whole population).
- Find the variance of the data 7, 3, 9, 7, 10, 5, 5, 10 (treat them as a whole population).