Describing data - Median and interquartile range
10 important questions on Describing data - Median and interquartile range
What is, after the sample mean, the next most common used metric to describe distributions?
What kind of observation is the median, and what is it's function?
How is the median calculated? Take into account a dataset with 1. Odd numbers of observations and 2. Even number of observations.
- If the number of observations is odd, then the median is the middle observation by [n+1]/2
- If the number of observations is even, then the median is the average of the middle pair: ((n/2)+(n/2+))/2
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
For my 1st exam I got a C. Then, I started looking for ways to learn better and I came across Study Smart. Since then I have scored a A+, A, A- and another A. I highly recommend it to everyone who wants to hear it. I am so happy with it!!
I was struggling to finish all my first-year subjects for 3 years. Then I discovered Study Smart, which helped me to finish all of them within 3 months.
Because of StudySmart, things are going well in many ways. Before, I always had study stress and no time for anything. Now I feel calm and confident (because of the program). I used to score a B, now I usually score an A or A+.
Hey Chris, I really want to thank you very much for developing the platform, I usually got around C for my exams, now I scored an A+, an A and a A- !!
Since using Study Smart, my average has increased significantly. I even completed a statistics course with a A+ while I'm bad at statistics. I took on extra courses this year, because of Study Smart. Thanks so much!
Ever since I started studying with StudySmart I passed all my exams !!! No more re-sits!! At first, I was happy with a pass and now I only get good grades. Many thanks!
I aced all the courses I studied with Study Smart. For law, I first scored a D, and now an A! I’m 100% sure that I’ll pass all the courses I study with Study Smart.
I always thought I studied well. My grades were fine. I could never have imagined that applying these study skills would have such a huge and direct impact on my grades, my speed and the pleasure I have in learning.
For the first time, I finally feel totally confident about the way I learn. I have the perfect overview and make great progress in terms of speed and the grades I get. Thanks, Chris!
I immediately started to enjoy learning again, and my grades soared. All of a sudden, everything went better. I highly recommend Study Smart to all students..
Being able to create my materials online made the process of studying so much smoother and quicker. I no longer have to spend a huge amount of my time on creating my summaries.
At first, my notes were a mess. Now I use Study Smart to take my notes in a perfectly structured way. It helps me to save a lot of time and do other things I enjoy.
Students that study with Study Smart get better grades. The system applies all the learning methods in such a way that both well-performing students and students who struggle perform much better.
Hi Chris, I would like to thank you very much. Last year I scored C on a course, and this year I got an A+ thanks to your method! Thank you very much!
The largest effect is that my child is more enthusiastic about school! Every parent wants their children to be happy at school, Study Smart made it happen.
In high school, I failed several exams, and that has really changed now. I actually needed this tool very much back then. Since I started studying with StudySmart, I haven't had any D's. My average score is now an A and those are results I would have never had in the past
With my old method, I passed only 3 out of 8 courses. Since I started taking my notes digitally in Study Smart, I have passed all my courses on the first try. For me, StudySmart takes away the stress of wondering if I will pass or not.
Thanks to StudySmart, I passed all my exams, and with better grades than before! On top of that, I have mastered a very good study method now, which I am confident will help me earn my degree.
The median is the 50th percentile and the 0.5 quantile, why?
The 0.5 quantile is the value below which 0.5 of the individual values lie.
What do quartiles do with the data?
Describe what the first, second and third quartile point out on the frequency distribution, give the percentiles.
- First quartile, 25th percentile, is the middle value of the measurements lying below the median.
- Second quartile, 50th percentile, is the median.
- Third quartile, 75th percentile, is the middle value of the measurements above the median.
How is the interquartile range calculated?
- Break the data in half (leave out the median when n is odd)
- First and third quartiles are calculated as the mean.
- Interquartile range = third quartile - first quartile
!This is a value that points out the range of the data in the units of the data, f.e. For weight it will be 50kg.
What does the box of a box plot display of a frequency distribution?
What do the whiskers of a box plot show?
What is extreme value of a dataset? How are they plotted in a box plot?
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
