A data consists of $$n$$ observations: $$x_1, x_2, \ldots, x_n$$. If $$\sum_{i=1}^{n}(x_i + 1)^2 = 9n$$ and $$\sum_{i=1}^{n}(x_i - 1)^2 = 5n$$, then the standard deviation of this data is:

Name: A data consists of n observations: x_1, x_2, \\ldots, x_n. If \\sum_{i=1}^{n}(x_i + 1)^2 = 9n and \\sum_{i=1}^{n}(x_i - 1)^2 = 5n, then the standard deviation of this data is:
Uploaded: 2026-05-21T10:43:46.335949+05:30
Duration: 2 min 58 s
Description: A data consists of n observations: x_1, x_2, \\ldots, x_n. If \\sum_{i=1}^{n}(x_i + 1)^2 = 9n and \\sum_{i=1}^{n}(x_i - 1)^2 = 5n, then the standard deviation of this data is: