Arandom sample of 10 subjects have weights with a standard deviation of 11.352211.3522 kg. what is the variance of their weights?

The variance of their weights will be 128.872... kg²

Explanation

Suppose, the variance of their weights is

Given that, the standard deviation is 11.3522 kg.

We know that, standard deviation is always the square root of the variance and if the standard deviation is in kg, then variance will be in kg². So......

So, the variance of their weights will be 128.872... kg²

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

after simplifying it i got: -36.25 as my answer. hope that !