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To find the mean number of siblings, we first need to calculate the sum of the number of siblings for all the 6th graders:
(0 * 3) + (1 * 12) + (2 * 5) + (3 * 2) + (4 * 0) + (5 * 1) = 0 + 12 + 10 + 6 + 0 + 5 = 33
Now, we divide the sum by the total number of 6th graders surveyed:
3 + 12 + 5 + 2 + 0 + 1 = 23
Mean = 33 / 23 = 1.435
Rounded to the nearest hundredth, the mean number of siblings for the 6th graders surveyed is 1.43 siblings.
Therefore, the answer is:
1.43 siblings