Combined Mean, Standard Deviation and Variance

In this video, the formulae for calculating combined Mean, standard deviation and variance were explained in detail with worked example. Please, like and share the video. Also remember to subscribe to our TH-cam channel today. The link is th-cam.com/users/oninab...

[@sue846]

Thank you very much for uploading this as i requested from the previous standard deviation, you video, your voice is very audible and clear to the point. you really need more views and likes on this. i have checked almost all your video, starting from mean, median mode standard deviation, and combined and must you say you are excellent. keep uploading more. THUMBS UP. ONINAB RESOURCES.

[@OninabResources]

You are welcome.
Thanks too for being part of us. Your complement is highly appreciated.

[@alawiyyasulaimanilu3442]

Thank u sir very helpful, my Allah reward u for helping us

[@asogvideos]

Love the way you present, awesome and helpful

[@FaizShakirNure]

Baay'ee bayyyeeeee galatomi I love you thanks for giving best tutorial

[@ringkhangdaimary1897]

Thank you so much sir for well teach to us 🍓💝

[@user-cq7tc9nl5s]

Thank you so much!!!!

[@FathimaSameeha-x3b]

Variance answer is not correct sir pls explain

[@JaySampa]

Awesome

[@FathimaSameeha-x3b]

Answer is 6.033 maybe

[@s.ethhhh]

Hi! This was really informative. I have a question though. If the question gives us a sample instead of population, do we simply just change N into n-1 ? For example ,in this question, will it become (40-1)(5^2+6^2) etc..... and the denominator will become (40+60-1)?

[@tebitheirrychick]

Is combined standard deviation the same as covariance square???

[@nikhilverma7304]

Love from India

[@OninabResources]

So nice of you.
We really appreciate your feedback.
Warmest regards.

[@umangkashyap9388]

What if variance is given and standard deviation not given

[@OninabResources]

You find the square root of the variance to get the standard deviation.

[@SharanGaming]

Do I have to follow the same method, when the means are same for two samples? Please reply.

[@OninabResources]

Thank you for your feedback.
No, you don't need to since the means are the same.

[@NampiimaBetty]

This was really really helpful

[@peterchikoya4944]

(a) A service station has recorded the following frequency distribution for the number of gallons of gasoline sold per car in a sample of 680 cars.
Gasoline (gallons) 0-4 , 4 - 8 , 8 - 12 , 12 - 16, 16 - 20, 20 - 24
frequency 74 , 192 , 280 , 105 23 6
(i) Compute the mean (2 marks)
(ii) Compute the variance (5 marks)
(iii) Compute the coefficient of variation. (2 marks)
help me with this question

[@OninabResources]

I advise you watch the video of the link to help you.
th-cam.com/video/lp2nTFdYGec/w-d-xo.html

[@augustinbutera9409]

thanks a lot

[@sohanlobo1207]

Super teaching 😊😄😄

[@davidbrennan8916]

Thank you very much for the video, very helpful.
Do the variables have to be independent for them to be combined in this way?
If so, is there another way to combine dependent variables?

[@minhajuddinansari561]

I was thinking the same. Did you find your answer?

[@Thomasrealmontage]

Thanks a lot!!

[@OninabResources]

You are welcome

[@footballfrenzyy]

Thank you❤

[@OninabResources]

You're welcome.

[@augustinbutera9409]

i need also lesson on semi variance

[@brightonyasa9524]

Please can you do quadratic equetion graph please Sir.

[@mdshibli1009]

Nice

[@tanyapandey8436]

💯💯💯

[@JoyfulJourneysKids-x7d]

Thank you very much,