Grouped Frequency Distributions: Constructing a Grouped Frequency Distribution - Example 1 Part 1

This video details the steps to be followed in order to construct a Grouped Frequency Distribution from a Raw Data Set. The details four instructive steps.
Please note a small error, although this does not take away from the conceptual idea. The class interval is calculated as (76/6) when it should be (72/6).

[@allanda81]

The video was great! I learned how to construct a frequency distribution table with clear cut directions that I was able to understand. Thanks a lot Jonathan!!

[@macerking5516]

Great Video! I understood everything despite the calculation error. 72/6=`12.0

[@cadlacdave]

Agree good tutorial but 72/6 = 12

[@sandrasaleh8455]

he did 76/6 thats why it came up as 12.6

[@harshitchajer6040]

@@sandrasaleh8455 yeah see the claci, he did 76/6

[@kumelachewmaru2225]

Sure, I am not clear why that is the case too.

[@ahmadsabri1975]

Very good video. The noticeable minor errors made me more attentive. I think you purposely made the mistakes. Kudos and good job.

[@amarieb5727]

your video helped me a lot for a test tomorrow. thanks!

[@tebogomoroka1363]

Thank you so much. i was struggling to construct the frequency also but now i know thanks.

[@munishamaheshwari5100]

Awesome video ever... I understand how to construct group frequency distribution

[@MathsAndStats]

That is great to hear Munisha. Well done. Regards Jonathan.

[@elijahmwanza3744]

Great video. it really helped

[@benitogarcia5284]

Fantastic! Thanks Jonathan

[@Andrea-wp6tw]

THANK YOU SO MUCH!

[@barack_mohib]

amazing and helpful video thank you sir i appreciate 👏👏

[@danielmahoney7105]

great content

[@jacobreocardeo2430]

This is absolutely amazing, this is a really helpful video. But for the observations that are at least 5 but less than 18, why is 17 not counted?

[@lumine_iris3985]

If the data values have decimal do we also make the width a whole number?

[@mohomedibrahim5148]

thank yuo more I strugling how to construct the frequency distribution you make easy thank you gain I hope you long and happy live

[@swaruparanithatipamula5052]

Thank you so much

[@rhobelynllacuna9408]

where did u get the sample size number 52?? i was confused by that

[@endastory72]

Nice one Jonathan

[@funnyvideo-mh2ys]

Well explained

[@saderacina]

You can also use largest-smallest/k

[@prettyshooterb2161]

Great video

[@yang3638]

B T

[@pervezdar7340]

72 divided by 6 is 12 sir not 12.6

[@aminabintabdulquddus8372]

72/6 = 12 and not 12.6...

[@climax7260]

Thanks

[@chumari8528]

72/6 =12 dude

[@danielallen6124]

HAHA

[@Sup_keke]

yeah he typed 76 by mistake into the calculator

[@LifewithShar]

Hey u lost me for a bit for the first one its 5-18 so it should have been 5 frequencies if u had included 17 but u counted it in the other range of 18 to 31

[@musiczelot124]

why do the classes over lap ?

[@disharimisra2386]

Even I didn't understand why do the classes overlap it should be in inclusive form right?

[@markbardett4557]

I'm thinking that for 2k you double then square, double then square as these aren't a continuous set of squared numbers in the column.

[@MathsAndStats]

Hi Mark, The 2^k rule is not asking you to square, it is asking you to exponentiate (a complicated word for calculating powers). For example: 2^1 = 2 2^2 = 2*2 = 4 2^3 = 2*2*2 = 8 2^4 = 2*2*2*2 = 16 Yes, you are effectively doubling the previous 2^k value. Regards. Jonathan.

[@markbardett4557]

@@MathsAndStats thank you i get it now.

[@kairazen8679]

I think the 73 is not the largest number but the 76

[@ananyarai6509]

Heyyyaaaa!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!😄😄

[@aneesali9731]

Sir, if n=19 then k rule is not right why.....?

[@MathsAndStats]

k | 2^k 1 | 2^1 = 2 2 | 2^2 = 4 3 | 2^3 = 8 4 | 2^4 = 16 5 | 2^5 = 32 So Anees, for a sample size of 19 observations you would need to have 5 classes, because; when k = 5, 2^5 = 32 is the first to exceed the sample size of n =19. I hope this helps.

[@aneesali9731]

@@MathsAndStats thanks a lot.

[@ridetv4154]

Why 1 to the power of 2 is equal to 2? And 3 to the power of 2 is equal to 8? It should be 1 and 9 . Correct me if im wrong.

[@MathsAndStats]

Hi Laptrip, Yes, you seem to be a little confused about the concept of exponentiation. Let me try to help: First: you mention 1 to the power of 2 - this should have been read as 2 to the power of 1. Second: you mention 3 to the power of 2 - this should be read as 2 to the power of 3. Remember - powers are just shorthand for multiplication. 2 to the power of 3 = (2)(2)(2) = 8 2 to the power of 4 = (2)(2)(2)(2) = 16 3 to the power of 2 = (3)(3) = 9 3 to the power of 3 = (3)(3)(3) = 27 What you mentioned was: 1 to the power of 2 = (1)(1) = 1 3 to the power of 2 = (3)(3) = 9. I hope this helps. Regards Jonathan

[@ridetv4154]

@@MathsAndStats wow thanks bro. It helps me a lot. Appreciated thank you. 🙂

[@praveenuniyaliswki8921]

Could the narrator please explain how (72/6)=12.66?

[@MathsAndStats]

Typo. :-)

[@mkssenthilkumar8843]

Gethu da samiyar

[@anthonytenorio9014]

Nice video but you are wrong.. 72 divided by 6 = 12 not 12.6666

[@maryjanesoria1070]

Please help me with the number of classes😭

[@EnvoyJordan]

typing error 76/6=12.666667 in your calculator

[@Justus040]

72/6=12

[@dainanngreene4269]

hi there is an error in the calculation. it 72/6=12 but you calculate 76/6=12.6666667. lost me there

[@MathsAndStats]

You are right Dainann, 72/6 = 12. A rush of blood to the head here, I put 76.6 into my calculator instead of 72/6. Jonathan.

[@dainanngreene4269]

ok understandable. i understood the concept so it didn't hinder me from getting it correct in class today. Thank you for making frequency distribution so easy

[@arowoloidris3112]

Me also got lost

[@gabrielmulenga3819]

the values 5-18 are 5 not 4

[@osnachan9717]

Great vid but sound like asmr as well

[@Daniel-cz3vn]

I thought classes were not supposed to overlap

[@MathsAndStats]

Hi Daniel, you are correct; all classes should be mutually exclusive and an observation should fall into only one specified class. With that said, our classes are inclusive of the lower bound and exclusive of the upper bound, probably more appropriate for a pure continuous variable rather than a discrete variable. The main point thou, the frequency distribution is purely descriptive in nature and should always be accompanied by a clear key indicating if the classes are based off half closed half open intervals [ , ) as opposed to fully closed intervals [ , ]. thanks again for your comments. Kindest Regards. Jonathan

[@abhishekmalviya5853]

please solve thisdifficult question 7. Following table shows the scores obtained bystudents of nutrition: 60 94 75 82 72 57 92 75 85 77 91 72 85 64 78 75 62 49 70 94 72 84 55 90 88 81 64 91 79 66 68 67 74 45 76 73 68 85 73 83 85 71 87 57 82 78 68 70 71 78 69 98 65 61 83 84 69 77 81 87 79 64 72 55 76 68 93 56 67 71 83 72 82 78 62 82 49 63 73 89 78 81 93 72 76 73 90 76 For the scores present above: a) Construct a frequencydistribution of grouped scores having approximately15 intervals. List both apparent and real limits of each interval. b) By using frequency distribution, computed in part (a), determine 40th percentile; P40. c) Also, calculate percentile rank of a score 41&76.

[@skard293]

72 ÷ 6 = 12

[@lamessateshale8885]

What is "n" represent????

[@MathsAndStats]

"n" is the symbol that is traditionally used to denote the sample size. In this case we have 52 observations, and so n = 52.

[@lamessateshale8885]

I took it according to the amount of our data...right or wrong?

[@MathsAndStats]

@@lamessateshale8885 That's correct.

[@maxpercer7119]

interesting rule of thumb

[@jeroldlago7299]

72÷6 ????

[@MathsAndStats]

:-)

[@warepamdevi3547]

u are wrong 72/6=12

[@iTwist24]

in his calculator he calculate 76/6 loooool instead of 72/6

[@bricksetter4134]

I thought i was crazy

[@priscilliaekpe7549]

72/6 is 12 not 12.666666666

[@kairazen8679]

I think the 73 is not the largest number but the 76