Sxx, Standard Deviation, and Variance | Statistics

We show how to find Sxx for a data set, and how to use Sxx to find the standard deviation and variance. We'll use the formula for Sxx that is the sum of the squared deviations, and we'll use a shortcut formula which is the sum of the squares minus the squared sum divided by n. We'll do this by hand, and show how to calculate Sxx on a calculator. #Statistics
0:00 Introducing Formulas
2:54 Calculating Sxx
5:05 Using Sxx for Standard Deviation and Variance
6:02 Using Shortcut Formula for Sxx
8:04 Calculating Sxx with Calculator
Finding Sxx with Calculator: • Find Sxx for Data with...
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[@WrathofMath]

Happy Monday! I just dropped a new math rap over on my MathBars channel! (previewed at the end of this video) ruclips.net/user/shorts2eDl0IK2hfI?feature=share
What stats video should I do next? Check out my playlist-in-progress.: ruclips.net/p/PLztBpqftvzxXIKQH2GUoqrJOMLbvAckV5

[@BeforetheStorm.]

Really good explanation thank you

[@WrathofMath]

Glad it was helpful, thanks for watching!

[@destroyion1e73]

hey! I had a question, whats the difference between angle subtended by AB "from" C & angle subtended by AB "at" C? in both cases the angle is formed at C. So is there any difference?

[@WrathofMath]

Hello! Did I use those words? There is no difference so far as I know. Either phrasing makes sense, the angle comes from C in a sense, but it is also an angle whose vertex is at C.

[@michaellee2008]

My question is regarding the notation Sxx. why there are 2 'x' on the subscript part? could you explain that one, please?

[@WrathofMath]

I don't know for sure. I assume it serves two purposes. 1) It distinguishes it from Sx, which would be assumed to be the standard deviation of the x values. 2) It represents the two x's in the formula (xi - xbar).

[@dwaynejong-sun6824]

all my homies hate stats

[@WrathofMath]

Same

[@aashsyed1277]

Is expected value defined here?

[@husenendris]

Veri gud

[@WrathofMath]

Thanks for watching!