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5:06 Sir, is the sample variance different from the population variance? I want to ask whether in machine learning to calculate variance and standard deviation on a dataset using sample variance and standard deviation?

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Can you do a Calculus BC review.

Why did you use n-1 ( unbiased )and n at the same . Please could you advice on it?

3:19 Sir, i want to ask, is the deviation with standard deviation different?

What do you call to this table Classic interval | f | x | (x-mean) | (x-mean)² | rf | cf | rcf |

What Programm do you use as drawing Programm?

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1 A meteorologist interested in the consistency of temperatures in three cities during a given week collected the following data.the temperatures for the five days of week in three cities were

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I need a pros and cons list of the 2

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sir why we calculate frequency in it bcz without frequency the answer is also same

Thank you..

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Why n-1 instead of n?

@_femme_force

Жыл бұрын

the n is for population and n-1 is for sample

@lyka1237

Жыл бұрын

@@_femme_force why n-1 instead of n

@_femme_force

Жыл бұрын

@@lyka1237I already answered that for you, in statistics when you are in a profession like data science you deal with population and samples when n is used it is a large group of population and n-1 is when you dealing with a smaller range population (sample).if you still don't get it ask Google

@funfeces3450

Жыл бұрын

@@_femme_force he’s asking why minus 1 ? like why wouldn’t you minus 2 or 50 ?

@Random_Art822

11 ай бұрын

​@@funfeces3450 it's just the formula for it's called bessel formula. It's like asking why is the formula for mean used for finding the mean. It's just how it is

nice one

Please why are we using n-1

great!

Is it divided by 'n' OR is it 'n-1'? Think its n. Not sure about the reasoning behind n-1.

@mariamasannymohammed16

4 жыл бұрын

This becos when n is less 30 u will substrate by one and if n is greater or equal to 30 u will maintain it .note it's only apply for ungrounded data

Love ❤️ you

4:41 Why is 1 subtracted from n?

@spinach7205

4 жыл бұрын

In calculating population standard deviation, you divide by N but for calculating sample standard deviation, you divide N-1 , the 1 is subtracted as our analysis is based on samples, this is done to avoid any biased nature of the collected samples.

U R = SMART

I love you

what app are you using for writing that?

n-1 is for sample, n is for population

✨🙏

Help please. A retailer observes that the demand for a popular board game averages 40 per week with the standard deviation of 13. If the seller wishes to have adequate stock 99% of the time, at least how many games must she keep on hand?

Confusion ooh but as for the ungrouped data u are correct but when u are solving for the grouped data u make a mistake,wen the total frequency is less than 30 u will maintain but if it's greater or equal 30 u will substrate by one. Plz it's applied for grouped data only

423

*r/iamverysmart* Also thanks this data crap got my head tangled for weeks 🙏