Mlungisi Nkosi | Grade 12 Mathematics | Statistics | Ogives - Cumulative Frequency curves

Part 3 of Statistics on Polygons and frequency distribution curves
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[@blackgross6372]

"Good day everyone we are back together" you know uncle is about to deliver gems to change this generation

[@MlungisiNkosi]

😍😍😍😍😍😍😍😍

[@nkosinathi.lepolesa5819]

So grateful to have you, Sir, for Maths and Physics lessons. This channel is really my go-to for revision

[@MlungisiNkosi]

You want to see tears rolling down my eyes neh…

[@kagisoseer6706]

You see if I fail to obtain Level 7 at final on Maths & physics I will be the one who's having problem.Non the less Malume Mlu you know your thing 💯💯💯💯💯💯💯💯💯🤞🏿

[@MlungisiNkosi]

Go for it 😃

[@kagisoseer6706]

@@MlungisiNkosi I will definitely do so.🤞🏿

[@SbuJSM]

Best Ogives video in the internet ♥️🤘🏾🔥

[@MlungisiNkosi]

You’re welcome

[@SthembileVictoria]

❤May god bless you I now understand you so great

[@MlungisiNkosi]

Thank you ☺️

[@banzokubheka5267]

Great lesson sir as always..just a friendly reminder as the prelims are nearing plz don't forget electromagnetism grade 11 lessons u promised 😂😂🔥

[@MlungisiNkosi]

There’s no end it sight with you guys 🤧

[@banzokubheka5267]

@@MlungisiNkosi 😂😂😂🔥

[@kundisingo5752]

I now understand better than before✌️🎊.. I hope you will drop another vid of statistics of histogram, outlier, varience ....

[@MlungisiNkosi]

Most definitely… I spoke about outliers in our previous video.

[@harper8113]

love the lesson sir but i think you a little bit too close to the camera

[@MlungisiNkosi]

Thanks I’ll make adjustments in future

[@Goitseemangg]

Thank you sir for these requested lessons❤️

[@MlungisiNkosi]

It’s my pleasure 🙂

[@thabozulu21]

Sir ngicela ukubuza ukuthi is (Q1 always = 25%) & (Q2 = 50%) & (Q3 = 75%)❓

[@aminasufi5672]

Good day sir for fi × xi,isnt it supposed to be 18× 25...then 30 × 35...66 × 45 and so on as we are multiplying the frequency by the midpoint/xi? Please correct me if i have misunderstood🤔 This is at time 14:00

[@sindisiwegavu2918]

I'm also confused on that part

[@LesegoMabethiwa]

​@@sindisiwegavu2918same here😢

[@aviwelose1615]

You such a great teacher❤️

[@MlungisiNkosi]

Thank you

[@malekaireneramogohlo6391]

thank you so much for the lesson . Do we always use 25%; 50% and 75% when we determining Q1,Q2,Q3 respectively?

[@MlungisiNkosi]

Yes we do

[@swisspenda9264]

Please May you do one that we are given the ogive graph and not the table and also how to find the percentile from the graph

[@MlungisiNkosi]

The process is exactly the same… To find any percentile, you do exactly the same as finding the quartile

[@zikho3102]

@@MlungisiNkosi look sir I knw how to calculate when it odd and even Yes sir I did calculate the mid point

[@usisiphofunda7870]

Sir please do more questions on probability 🙏🙏especially past exams

[@MlungisiNkosi]

I need to finish Statistics first

[@nokwaziknowledge3513]

Thank sir😊you are the best 👌

[@savagesteven1598]

Sir could you also do a playlist on statistics so that things could easily be effective

[@MlungisiNkosi]

Will do

[@rialivhuwanemutanzhela3399]

sir how do we find the median if we are given the ogive only

[@rtithegoat2193]

U just followed my girl Northside doll 😅💚

[@MlungisiNkosi]

Where?

[@flexace768]

Danko ®️ notification on

[@MlungisiNkosi]

Wola

[@sinawogantsho8006]

Sir can I ask how can I find a frequency when I am given a cumulative frequency and the middle class values only

[@lydiathobejane7139]

Thank you so much

[@mamabeesglowup807]

hi sir on the 2016 feb/mar p2 that you used question 2.2 on the memo the midpoint you calculated is actually the cumulative frequency so am a bit confused and also the way in which you calculate cumulative frequency is it always the method or it depends on something PLEASE SEND HELP

[@sanelemzimela1374]

Mr "Favourite Uncle" can you not use , Q2=0.5(n+1) ???

[@MlungisiNkosi]

Yes you can 😊

[@user-lh1bu7or5l]

Do we necessarily have to put a percentage after the answer or it’s correct even without a percentage

[@lukaslesiba226]

Is it correct if I started my ogive at 0 ? Not at 20❤

[@MlungisiNkosi]

You always start at the lower bound of your first interval

[@lukaslesiba226]

@@MlungisiNkosi dankii sirr ❤

[@youngsliq3955]

Good day sir How do you find the modal class if they only given you the ogive?

[@MlungisiNkosi]

It will where your graph is steepest

[@BlackAngel-mf6do]

Thank you Grootman🙏🏼

[@MlungisiNkosi]

You’re welcome

[@tumzamahlaks9269]

Sir by 51:47 the number is 81, i think you made a mistake there.

[@MlungisiNkosi]

Thank you

[@odirekheswa1066]

Thanks sir😁👌

[@MlungisiNkosi]

You’re welcome

[@Lerato.Period]

But sir the 43.6 that you got is the mean right ? Not the median ?

[@MlungisiNkosi]

Yes it is…

[@mziwanomzyt8815]

You awesome

[@khonaniblktv]

Shoutout to you sir

[@MlungisiNkosi]

Thank you 😊

[@kgomotsomlambo1239]

Sir can you do a video where the data is changed and theres an effect on the standard deviation and when there's no effect

[@MlungisiNkosi]

Please check in my past exam section

[@hunadipitsi8091]

Thank u sir

[@azilefirst9866]

I highly doubt if I did the right thing.

[@MlungisiNkosi]

The fact that you’re watching this gives me hope

[@jacquelinepontsho9040]

Sir can you please do a lesson on counting principle

[@MlungisiNkosi]

A thank you would be nice yazi

[@jacquelinepontsho9040]

@@MlungisiNkosi sorry sir🥵Thank you for the great lesson 😘

[@wordoffireinternationalmin2330]

Sir on the last example question 2.2 is there no other way i could do it ?

[@MlungisiNkosi]

What method were you thinking of?

[@JustinRamatladi-jz8xd]

Hlw where did you get 25% 75% I just hear u saying those % without showing how u got them

[@Theeglamdoll]

12X35 is 420 not 450

[@MlungisiNkosi]

Oops!!!

[@zikho3102]

Sir in quartile 2 why did u said 50%X100

[@MlungisiNkosi]

That’s how you calculate the mean

[@zikho3102]

And also in quartile 3 sir I don't understand cn u plz sir try to explain again

[@MlungisiNkosi]

I tried to explain. It’s a percentage of n (the total cumulative frequency

[@zikho3102]

Thank u sir about this lessons... I did keep on watching tht video more than 3 times and now I understand why u are using tht 50 %X100... bt if we don't wanna use tht we can also use 1/2 instead of 50% ryt neh sir?

[@sannahnkabi3346]

Can we not add 18 +3+2 in Question 2.3

[@atlimolokwe6302]

Why is Q3 75 ?

[@MlungisiNkosi]

Please provide time stamp

[@atlimolokwe6302]

@@MlungisiNkosi 11:19

[@MlungisiNkosi]

@@atlimolokwe6302 remember Q3 is always 75% of your data

[@kgethegodelicious5670]

Sir is the name of learners the same thing as the frequency?

[@kgethegodelicious5670]

*number of learners?

[@MlungisiNkosi]

Yes it is

[@lethumzobe4497]

can you please teach us measurement grade 11....would appreciate that al lot 🥺

[@MlungisiNkosi]

Absolutely l will do so this very week

[@rodrickzengeni8718]

Mudzidzisi manyama

[@MlungisiNkosi]

Thank you 😊

[@1Rony_]

Sir can you please do a topic on counting principles

[@1Rony_]

Please before pre-lims

[@MlungisiNkosi]

I will… I promise