Confidentiality is a virtue which states that you need to secure information by limiting computer access to authorized personnel only.
Keeping confidential data is crucial especially if your business deals with very important information about a person and his security.
Trust is built between a company and a client. The client trusts the company to keep his information secure and confidential from outside parties. Once the confidentiality of the company is compromised, the business will suffer because clients will no longer trust the company to keep their data secure.<span />
I think the thrive over time by keeping balanced between the recycling of nutrients and diversity of species?
We can't answer this if we didn't see the video.
Compute the first and second moments. The first moment is the same as the expected value or mean. The second moment is involved in computing the variance.
First moment:
![E[X]=\displaystyle\sum_xx\,P(x)=0\cdot0.125+1\cdot0.428+\cdots+4\cdot0.083](https://tex.z-dn.net/?f=E%5BX%5D%3D%5Cdisplaystyle%5Csum_xx%5C%2CP%28x%29%3D0%5Ccdot0.125%2B1%5Ccdot0.428%2B%5Ccdots%2B4%5Ccdot0.083)
![E[X]=1.596](https://tex.z-dn.net/?f=E%5BX%5D%3D1.596)
Second moment:
![E[X^2]=\displaystyle\sum_xx^2\,P(x)=0^2\cdot0.125+1^2\cdot0.428+\cdots+4^2\cdot0.083](https://tex.z-dn.net/?f=E%5BX%5E2%5D%3D%5Cdisplaystyle%5Csum_xx%5E2%5C%2CP%28x%29%3D0%5E2%5Ccdot0.125%2B1%5E2%5Ccdot0.428%2B%5Ccdots%2B4%5E2%5Ccdot0.083)
![E[X^2]=3.752](https://tex.z-dn.net/?f=E%5BX%5E2%5D%3D3.752)
The variance of 
is
![V[X]=E[(X-E[X])^2]=E[X^2-2X\,E[X]+E[X]^2]=E[X^2]-E[X]^2](https://tex.z-dn.net/?f=V%5BX%5D%3DE%5B%28X-E%5BX%5D%29%5E2%5D%3DE%5BX%5E2-2X%5C%2CE%5BX%5D%2BE%5BX%5D%5E2%5D%3DE%5BX%5E2%5D-E%5BX%5D%5E2)
![V[X]=2.156](https://tex.z-dn.net/?f=V%5BX%5D%3D2.156)
The standard deviation is the square root of the variance:
![\sqrt{V[X]}\approx\boxed{1.468}](https://tex.z-dn.net/?f=%5Csqrt%7BV%5BX%5D%7D%5Capprox%5Cboxed%7B1.468%7D)
