2023 G12 internal maths question 12 paper 2 - Standard deviation and relative cumulative frequency

Are you ready to tackle 2023 G12 Maths Internal Question 12 Paper 2 on Standard Deviation and Relative Cumulative Frequency? Join us in this stimulating breakdown that will enhance your understanding of these vital concepts. Unlock the secrets to mastering these advanced mathematical principles with ease. Delve deep into the specifics of Standard Deviation and Relative Cumulative Frequency as we walk you through step by step. Prepare to up your mathematical game and soar to new heights academically. Don't miss this crucial tutorial on 2023 G12 Maths Internal Question 12 Paper 2 - Standard Deviation and Relative Cumulative Frequency!
Get ready to ace your 2023 G12 Maths Internal Maths Question 12 Paper 2 on standard deviation and relative cumulative frequency with this comprehensive video tutorial! Dive deep into the complex world of statistics as we break down key concepts and strategies to help you excel in your exams. Master techniques, calculations, and real-world applications, ensuring you're fully prepared for any challenge that comes your way. Don't miss out on this invaluable resource to boost your understanding and confidence in mathematics. Watch now to level up your math skills and conquer Question 12 Paper 2 like a pro!
Get ready to master 2023 G12 Maths Internal Maths Question 12 P2 in this insightful video focusing on standard deviation and relative cumulative frequency calculations. This analysis will sharpen your maths skills and boost your understanding of key concepts. Dive deep into the world of statistics as we break down complex problems and guide you through the step-by-step process. Whether you're a student preparing for exams or a math enthusiast looking to enhance your knowledge, this video is perfect for you. Watch now to unlock the secrets behind 2023 G12 Maths Internal Maths Question 12 P2 - Standard Deviation and Relative Cumulative Frequency.
Get ready to ace the 2023 G12 Maths Internal Question 12 P2 as we delve into the tricky realm of Standard Deviation and Relative Cumulative Frequency. In this detailed video walkthrough, we tackle key concepts, formulas, and step-by-step solutions to sharpen your math skills. Whether you're a student gearing up for exams or a math enthusiast seeking deeper knowledge, this tutorial has you covered. Don't miss out on valuable insights and strategies to tackle this challenging problem with confidence. Watch now and elevate your math abilities to the next level! #maths #InternalMathsQuestion #StandardDeviation #CumulativeFrequency

[@GSCEMathematicsZone12]

Also, watch how to find the Semi Interquartile Range here: th-cam.com/video/VKVXpDy3lfg/w-d-xo.htmlsi=2BasJGrmwyIQHUv7

[@PETERMWILA-x9d]

Exellent work❤

[@GSCEMathematicsZone12]

Thank you very much for the positive feedback. Please watch more Maths videos on this channel and remember to like, comment and share 😊

[@zwaumukanda]

wow very detailed sir am grateful ❤

[@GSCEMathematicsZone12]

My pleasure. Look out for Linear Programming (2023 Internal maths exam) comingoutsoon. In the meantime, watch how to calculate the standard deviation of ungrounded data here: th-cam.com/video/69SsSIPT8yo/w-d-xo.htmlsi=hdNDgJiERml0bPFE
Remember to like, comment and share.

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[@GSCEMathematicsZone12]

You are welcome. Kindly watch more videos on this channel and remember to like, comment and share.

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[@GSCEMathematicsZone12]

I'm glad you found it helpful!

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[@GSCEMathematicsZone12]

That's really nice to hear. Watch more videos on this channel and learn more. Remember to like, comment, and share.

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

We are glad to help 😀

[@ThandiwePhiri-w8h]

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[@GSCEMathematicsZone12]

Thank you very much for your positive feedback. Kindly watch also the "Linear programming video, " by clicking on the link below and don't forget to like, comment and share.
th-cam.com/video/m4qJQJd4pBI/w-d-xo.htmlsi=evhjL5bAORXRMlXl

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

More to come! You can also watch 2022 paper 2 cubic functions, remember to leave a comment, like and share here: th-cam.com/video/y6uNkhlF0xc/w-d-xo.htmlsi=HxN4O-Pt_pVZEFEu

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

Thank you very much 🙏

[@hellenhambulo8827]

You made it so easy 😊thank you sir ...

[@GSCEMathematicsZone12]

Thank you very much for your positive feedback. I'm glad you're enjoying. Kindly watch also the "2023 G12 Linear Programming video, " by clicking on the link below. Remember to leave a comment, like and share. th-cam.com/video/m4qJQJd4pBI/w-d-xo.html

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[@GSCEMathematicsZone12]

Always welcome and all the best

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Thank you very much for your time and please do some more explanations

[@GSCEMathematicsZone12]

More to come!

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Thank you very much. Keep watching more videos on this channel and remember to like, comment and share.

[@Robert22Banda]

Thank you sir for help me

[@GSCEMathematicsZone12]

You are welcome, you can also watch 2022 cubic functions and don't forget to leave a comment, like and share here; th-cam.com/video/y6uNkhlF0xc/w-d-xo.htmlsi=yDbeXcC6MW2mN9pA

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

Thank you very much for your kind words. Please watch more of our videos and remember to like, comment and share 😊

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[@GSCEMathematicsZone12]

Thanks for watching, I hope you found the explanation helpful.

[@PaulMwale-c3b]

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[@GSCEMathematicsZone12]

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[@evansmusonda2729]

Thank you sir

[@GSCEMathematicsZone12]

You are welcome. Kindly also watch the 2023 Linear programming video by clicking on the link below. Remember to like, comment and share. th-cam.com/video/m4qJQJd4pBI/w-d-xo.html

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[@GSCEMathematicsZone12]

Glad it was helpful!

[@FelixKapembeza]

Sir Is 0

[@GSCEMathematicsZone12]

No, they are different. The first class limit shows that 0 is not included while the second one 0 is included.

[@FelixKapembeza]

@@GSCEMathematicsZone12 thank you sir so does that mean even their midpoints differ?

[@FelixKapembeza]

Thank you sir,so does that mean even their midpoints differ?

[@GSCEMathematicsZone12]

@FelixKapembeza you are welcome. The midpoints remain the same. They Don't differ. You can only show the difference if it was an inequality.

[@FelixKapembeza]

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[@GSCEMathematicsZone12]

I'm glad I could help! Keep watching more videos on this channel, and remember to like, comment, and share.

[@TanyaradzwaMatengarufu]

Can I do it without calculate is it possible here

[@GSCEMathematicsZone12]

Yes, very much possible. I recommended a calculator because calculators are allowed in paper 2 and also you may save some time. Remember, you also wrestle with time In an exam.

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[@GSCEMathematicsZone12]

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Thanks again

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You're welcome.

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Glad to hear that. All the best!

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[@GSCEMathematicsZone12]

You're welcome. Yes, you are right, it's faster! Keep watching.

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

I'm glad you are enjoying. Please watch more of our videos and don't forget to like, comment and share 😊

[@FaithMusheke-x1t]

What if you round-off the mean from 28.666666667 to 29 is that also correct?

[@GSCEMathematicsZone12]

It was going to be correct if the main question was asking us to find the mean and you would have written it correct to 3 significant figures as 29.0.
But since we are using the mean as the road to the standard deviation, avoid such rounding, you can at least round it correct to 3 significant figures as 28.7 or just write the full number to avoidmistakes. Imagine if you keep rounding and shortening your answers in each step before you get to the Standard Deviation, it means that your final answer, which is the standard deviation may be highly affected. So, to avoid that, write the numbers in full or round them correct to 3 significant figures.

[@FaithMusheke-x1t]

@@GSCEMathematicsZone12 Alright thank you 🙏

[@GSCEMathematicsZone12]

Always welcome. Kindly watch more videos on this channel.

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[@GSCEMathematicsZone12]

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I'm glad you enjoyed 😉

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You are welcome

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[@GSCEMathematicsZone12]

Natasha. Twalilileni ukutamba ama videos from this channel.

[@ConstanceKatabanya]

Do we always divide by 2

[@GSCEMathematicsZone12]

Yes, for groupped data (data in ranges or class intervals) like the one in the question, you will always have to add the lower and upper class interval and then divide by 2, for you to find the midpoint.

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

Thank you very much 🙏

[@TeddySilungwe]

Why not dividing ef

[@GSCEMathematicsZone12]

Thanks for your message. What do you mean by ef?

[@CyrusBanda]

Thank you sir but Why don't we also divide by the sum of frequency?

[@GSCEMathematicsZone12]

I actually divided by the sum of frequency, 30 is the sum of frequencies. Even if you add all the total frequency from the table, you will still find 30 as the total frequency.

[@FebbyMusando]

Were do you find 2+6+9+7+4

[@GSCEMathematicsZone12]

They are the frequencies from the table.

[@ClementMurphy-w2j]

You should also teach mensuration sir

[@GSCEMathematicsZone12]

Noted, thank you.

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Sir do you offer online classes

[@GSCEMathematicsZone12]

Not at the moment.

[@PelserHoare]

Sir why are you dividing only with 2

[@GSCEMathematicsZone12]

Thank you for your message. We are dividing by 2 because that's how you find the midpoint of groupped data, data that is in a range. For example, the midpoint of the class range 0 < h < 4 is (0 + 4) ÷ 2 = 4÷2 = 2, also for 5 < h < 8 is (5 + 8) ÷ 2 13÷2 = 6.5 and so on.
So, this is how you calculate the midnight of every groupped data by adding the lower limit and the upper limit and then dividing by 2. Hope this is clear now.

[@DonayanaEliya]

Nice

[@GSCEMathematicsZone12]

Thanks, keep watching more videos on this channel and remember to like, comment and share.

[@BridgetBen-wj4pu]

Thanks so very much sir but my teacher included the 30 nd divided it

[@GSCEMathematicsZone12]

You are welcome. I used 30 when I used Σf.

[@GladysMwenya-fh6qo]

Sir why are you not including 7

[@GSCEMathematicsZone12]

You mean the 7 at the far end of 28.6666667?
During exams, mostly you are told to give your answers to 3 significant figures if the degree of accuracy is not specified. So, the 7 was omitted because whether the 7 is included or not, the final answer can still be written to 3 significant figures. Meaning whether the 7 is there or not, you can still round that number to 28.7 (3 significant figures). Hope this helps.

[@Nosikupumulo-d1z]

Sir even when writing the numbers is to use a pencil

[@GSCEMathematicsZone12]

Absolutely correct ✅️

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Yes​@@GSCEMathematicsZone12

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I like that

[@GSCEMathematicsZone12]

❤️😘

[@LenardTembo-xl4zi]

Why are you not including 7

[@GSCEMathematicsZone12]

You mean the 7 at the far end of 28.6666667?
During exams, mostly you are told to give your answers to 3 significant figures if the degree of accuracy is not specified. So, the 7 was omitted because whether the 7 is included or not, the final answer can still be written to 3 significant figures. Meaning whether the 7 is there or not, you can still round that number to 28.7 (3 significant figures). Hope this helps.

[@LenardTembo-xl4zi]

@@GSCEMathematicsZone12 alright thanks sir

[@GSCEMathematicsZone12]

​@LenardTembo-xl4zi
You are welcome, you can also watch how to calculate the standard deviation of ungrounded data using 2018 GCE Maths Paper 2 here: th-cam.com/video/69SsSIPT8yo/w-d-xo.htmlsi=j_Vk-FKXWtRBUaIJ, remember to like, comment and share.

[@DaisyMbunda]

What is that 991.9

[@GladysChilando-rt5nw]

Y did u not divide 30

[@GSCEMathematicsZone12]

I did. Kindly check nicely.

[@PatienceKaunda-o1e]

@@GSCEMathematicsZone12 u did but it's not correct 30/6 it's 5 not 15

[@GSCEMathematicsZone12]

Do you mean when finding the midpoint? If so, please not that to find the midpoint, you add the lower and upper class limits, then divide by two. I can see that the mistake you are making is dividing the sum of the lower and upper class limit by 6 instead of dividing by 2. So, please don't make such mistakes. Hope this is clear now.

[@FlorenceNyendwa]

And always remember to use a pencil when graphing, not a pen.

[@GSCEMathematicsZone12]

You're right. The pen was used because the pencil was not visible enough on the camera.

[@MaureenChilela]

Wow

[@GSCEMathematicsZone12]

Thanks

[@NaphelNdayana]

But why 7 it is not included?

[@GSCEMathematicsZone12]

Whether you include it or not, the final answer is going to be the same.

[@MutintaHakachima]

Sets past papers gce

[@GSCEMathematicsZone12]

Noted ✅️

[@tembaminyoi2253]

Sir how can I use this same formula when finding for grouped data

[@GSCEMathematicsZone12]

The process is the same. You can use this process and formula for both groupped and ungrounded data.

[@tembaminyoi2253]

@@GSCEMathematicsZone12 thank u very much sir God bless u and am kindly asking if u can teach me transformation

[@GSCEMathematicsZone12]

You are welcome.
Sure, expect a video on transformation, one of these weekends.

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🎉❤

[@GSCEMathematicsZone12]

😍😍

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[@GSCEMathematicsZone12]

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[@CollinsShumina]

0/30=0 not 0.00

[@GSCEMathematicsZone12]

The value is the same 😂😂

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I have seen you

[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

You are welcome. Keep watching.

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Thanks

[@GSCEMathematicsZone12]

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Thanks sir

[@GSCEMathematicsZone12]

You are welcome. Keep watching more videos on this channel and remember to like, comment and share.

[@NatashaKanungwe]

Thank you sir

[@GSCEMathematicsZone12]

All the best

[@FelixKapembeza]

Sir Is 0

[@GSCEMathematicsZone12]

No, it doesn't.

[@musakasimon]

Sir why are you not including 7

[@GSCEMathematicsZone12]

Because whether you include it or not, the answer will be the same.

[@musakasimon]

Why are you not including 7

[@GSCEMathematicsZone12]

Because whether you include it or not, the answer will be the same.

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Thanks sir

[@GSCEMathematicsZone12]

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[@GSCEMathematicsZone12]

You're welcome 😊