Calculating Uncertainty 5 - Averaging Multiple Measurements

This is the fifth one in the set of lessons on the assessment of total uncertainty in the final result. In this lesson, we learn to calculate the total uncertainty in case of averaging multiple measurements. In the next final lesson, we will be calculating the total uncertainty in case of timing experiments.

Please ask your questions in the comments section below. I would love to answer! :)

[saibiking]

Sir you are only reason I am studying in YouTube plz add every video of physics seriously need you !

[cierragrange]

This was extremely helpful. Thank you so much!

[johntik]

sir pleased explain the topics because we r completely getting u and add more videos as you r magician of teaching

[bogbert]

you have very nice handwriting, and this video helped me a ton! Thank you!!

[idreesk]

Sir plz ap asy he videos upload karty raho or topics k bare me be bcz ur teaching method is awesome. ....

[saibiking]

Thank you sir you people are respectful !

[utkarshmahto]

thank you sir
this will help me alot.
keep up the good work.

[khausiknarasimhan]

Hi Sir,
I have a question. I will put it in terms of the wire example.
What if I take six measurements of diameter of wire and calculate the error as shown but I also have to fine average diameter of multiple wires (for example 10 different wires). If I take the average diameter simply, what happens to the errors we obtained from multiple measurements for each wire? Thanks

[tmsjf.o]

Help
i don't understand. Why in the book that my teacher let us to read, it says that the absolute uncertainty is the deviation with the highest module?
Like, for example, an exercise is:
the temperature of one object is measured 5 times:
T1=25, 0
T2= 24, 9
T3=25, 0
T4= 25, 2
T5= 25, 0
the average value is 25, 02; but then the teacher wrote that the absolute uncertanty is 0, 15, whyy???

[victorsubbiah]

Are variance and uncertainty different?

[affankhattak]

sir plxx tell me...why we ignored the negitve sign during devaition???

[raj]

Sir please tell if flow of gas is 120lpm and unc 0.2lpm them how to calculate volume unc in case of ventilator

[farah]

wait is it the mean minus x data or the x data minus the mean or it doesnt matter as long as it is positive?

[Nadeemkhan-bknp]

Thanks thanks thanks Sir
☺️☺️☺️☺️☺️☺️☺️☺️🙂🙂🙂

[TheHiddenGoat]

of love sir u r so nice. oh also say Assalam o laikum ... when u startup ...thnx

[youtubeyoutube]

Sir y don't v consider the sign in this procedure?

[fethudinsemir]

Thank you SO SO SO much! May Allah bless you

[kidsstories]

Sir r u from turkey or pakistan? Where u from?

[mabaig]

Sir, Thanks for video, I need to calculate uncertainty of capacity measurement in (ampere hour) by using two instruments current meter and stop watch, please see help me to solve the problem

[jaredvancor]

I do not think this is right. In this case you are saying 1 measurement is as good as 1000 measurements. In random processes the uncertainty should fall off with the sqrt(measurements) (Poison statistics). There is some random noise about a mean, and the more measurements you take, the more certainty you have in the mean value. This will give you the uncertainty of your measurement aperatus though :-).