If `n=10 , X =12a n d∑x ^2 =1530 ,` then the coefficient of variation is (a) 36% (b) 41% (c) 25% (d) none of these

Explanation

To find the coefficient of variation given the values \( n = 10 \), \( X = 12 \), and \( \sum x^2 = 1530 \), we will follow these steps:

### Step 1: Identify the given values
- Number of observations \( n = 10 \)
- Mean \( X = 12 \)
- Sum of squares of observations \( \sum x^2 = 1530 \)

### Step 2: Calculate the variance
...