Find the variance of 3,24,30,47,43,7,47,13,44,39

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

I'll let you do the calculations.

find ur mean

let say ur mean is n
(n-2)²+(n-24)²till u reach d last no/total

To find the variance of a set of data, you can follow these steps:

1. Calculate the mean (average) of the data set.
2. Subtract the mean from each data point, and square the resulting difference.
3. Calculate the average of the squared differences.
4. The result is the variance.

Let's find the variance for the given data set:

Step 1: Calculate the mean
Add all the values together: 3 + 24 + 30 + 47 + 43 + 7 + 47 + 13 + 44 + 39 = 297
Divide the sum by the number of data points: 297 / 10 = 29.7
The mean is 29.7.

Step 2: Subtract the mean and square the differences
Subtract the mean from each data point and square the result:
(3 - 29.7)^2 = 784.09
(24 - 29.7)^2 = 32.49
(30 - 29.7)^2 = 0.09
(47 - 29.7)^2 = 305.16
(43 - 29.7)^2 = 178.09
(7 - 29.7)^2 = 519.84
(47 - 29.7)^2 = 305.16
(13 - 29.7)^2 = 284.09
(44 - 29.7)^2 = 204.49
(39 - 29.7)^2 = 86.49

Step 3: Calculate the average of the squared differences
Add up all the squared differences and divide by the number of data points:
(784.09 + 32.49 + 0.09 + 305.16 + 178.09 + 519.84 + 305.16 + 284.09 + 204.49 + 86.49) / 10 = 290.09

Step 4: The result is the variance
The variance is 290.09.

Therefore, the variance of the given data set is 290.09.