Statistics 101: Descriptive Statistics, Percentiles and Quartiles

[@rlcaust1]

You are the only reason I'm passing Mathematical Modelling 2 at UTS. Thank you so much, these videos are amazing!

[@kathyknapp5519]

Always very clear, concise and understandable. Thank you, Brandon!!!

[@pereriksson1518]

Oh my god Brandon you funny man :) Thanks for a great 2-week course in statistics. This is truly the best source I have ever found.

[@sadiamchandio]

This is the best ever explanation of percentile system. In the past I’ve always struggled with this concept. Thanks a million!

[@valor36az]

Great to see you are still making content, awesome as usual

[@vamshikrishna298]

I am searching for a Percentile exact formula and how it works in the case of a non-sequential list. finally understood ...Thanks a lot.

[@MaverickRam]

Hi Brandon, is there a reason to use two separate formulas for the same thing? I mean the formula at 18:30 and the one at 7:40 both give different results and I think they shouldn't. Am I missing sth?

[@arminsmajlagic2907]

You are great help man. Much love for ur work !

[@kunalbalooni797]

While calculating the values (not positions) of quartiles in the example (@11:18) so we take assumptions about the distribution of the data like it being normal?

[@sbdavid123]

Why is there a 0.5 in the percentile formula? I get that it is a correction for equal values and in my mind it makes sense for two equal values, but will this remain 0.5 if there are for example 7 equal values? And if so why? Thanks for the great videos!

[@asiddiqi123]

You are making me to love statistics.

[@unimpressedsquidward3059]

Hi Brandon, good video as always. Would you mind to briefly discuss/explain how the percentile value calculation formula was derived? Thanks

[@KirillBezzubkine]

1:33 - AWESOME !!!

[@uchechiotu636]

I thought you mentioned quartiles as having 4 equal parts, how come 5:14 is showing just 3 quartiles?

[@uchechiotu636]

Very clear now at 6:57

[@prabhudaskamath1353]

Good Lecture..

[@sulaimanmuhammad7529]

Hi Brandon, Thank you for the awesome statistics videos. You have really done a beautiful job. Permit me to screen shots all your presentations so I can it to create my lecture note

[@dhavaldwivedi]

Excellent

[@kamran_desu]

Amazing way to segue into boxplots :)

[@lukaskinezi430]

Hi, Mr. Brandon. I have a question for you. How to point quartile at particular site i.e. in between observations I have if the value of observation is an odd number, let's say 13 observation instead of your example shown as an even number of 12 observations. Thank you.

[@lukaskinezi430]

I have a few thoughts coming in my head, but I would like to hear your idea. :)

[@mayanksharma266]

Thnks from india

[@MAZEDURRAHAMAN]

Just Love Boss

[@christophepical5933]

Hi Brandon. You specifically say there are 4 quartiles (with 3 values in each). But there is only Q1 (lower quartile), Q2 (Median) and Q3 (higher quartile) in your video. Where is Q4?

[@BrandonFoltz]

Hi! Q1, Q2, and Q3 are the boundaries that split the observations into 1/4ths or 25% segments. Like cutting a strip of paper into 4 equal pieces only requires three cuts.

[@christophepical5933]

Yes, I understand that. I got confused because quartile seems to designate two things, the boundaries and the segments. You say in the example, the dataset is split into four quartiles, each with 3 observations. Or am I missing something?

[@ВасяИванов-щ6з]

Didn't Q1 quartile (3.25) miss her spot on plotting chart? Make it clear, please.

[@ok-sp9xf]

0.375 rounded up to 38th Percentile? It's 1:53 am and I've been studying since 7 pm. sigh..