A value representing the lowest $n$ percent of the values in a data set or of the possible values of a random variable.
Questions tagged [percentile]
155 questions
2
votes
1 answer
Find how much something as reduced by in %
I'm using Huffman encoding to perform an encoding on a string, soon I'll move it be used on compressing images.
I've got the length of the string: x
I've got the length of the encode string: y
I want to know in a percentage how much smaller y is…
Callum Linington
- 145
1
vote
1 answer
Find percentile of Discrete Probability Distribution
This is just a hypothetical question that I had (I made this question myself, just am curious about something). What if we were trying to find the $20\text{th}$ percentile in a discrete probability distribution from $0 \leq x \leq 5$, where
$F(0) =…
user833373
1
vote
1 answer
Given a number (17) between a range of numbers (14-21) or (minRange-maxRange) what is the formula to achieve an output of 0 - 1?
Given a number (17) between a range of numbers (14-21) or (minRange-maxRange) what is the formula to achieve an output of 0 - 1?
So given a range of (14-21) with a number of 17.5 would achieve an output of .5.
So given a range of (14-21) with a…
Keith Becker
- 113
1
vote
2 answers
Calculate percentile rank
I am confused with the concept of percentile rank.
I am in the top 7 of my class, how would I calculate my percentile rank?
Number of students 72
I am 7th rank in my class
Does this mean my percentile rank is 7?
Blue Hat
- 41
1
vote
2 answers
Calculate percentage given 25% percentile, 50% percentile, and 75% percentile
I've been given the following which shows new membership sign-ups per campaign:
Average: 291
25% Percentile: 219
50% Percentile: 283
75% Percentile: 347
And need to calculate the percentage for a given value.
I Googled for a solution but from what I…
Ian Lunn
- 119
0
votes
1 answer
How is percentile calculated
I have the following list:
[1, 2, 6, 2, 2, 8, 8] and python gives me the following values for percentiles for each of the element:
[14.28, 42.85, 71.42, 42.85, 42.85, 92.85, 92.85]
Can anyone explain how to calculate them by hand?
Salvador Dali
- 2,645
0
votes
1 answer
Percentage help for my slider program.
I'm trying to create a program which allows the user to enter in any number of values, where each value can be any number. For example, the user may choose to enter the following 4 values:
-478.93
485.44
569.48
593.82
What formula do I need to use…
oshirowanen
- 111
0
votes
0 answers
percentile calculation on group of data?
So I know how to calculate percentile on a simple data set:
lets say student grades are 38, 47, 49, 58, 60, 65, 70, 79, 80, 92
Number of scores below 70 = 6
Using the percentile formula,
Percentile = (Number of Values Below “x” / Total Number of…
JavaSheriff
- 111
0
votes
0 answers
How to calculate percentil from percentil subresults
I would like to calculate the 90th percentile, for example p90 for this dataset:
p90(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) = 9.1
Problem is that due to technical limitations I don't have whole dataset available for the calculation and only partial subset…
Jan Garaj
- 101
0
votes
1 answer
75 percentile: find top offenders
Imagine that a car company wants to analyze all those orders late, yet to be delivered to customers. By late I mean that, to date, the contractual delivery date has expired.
ID simply refers to the i-th order.
What I called Span is simply the…
Marco
- 123
0
votes
0 answers
The 44th percentile is the .44th __?
I'm searching for a very simple word.
We are all familiar with the concept of the 44th percentile of a real, random variable. In a sense, percentile (parameterized by the random variable) is a function from [0, 100] to $\mathbb{R}$.
That's... kinda…
extremeaxe5
- 1,110
0
votes
1 answer
Percentile solving without full data set
Given a group of 245 students taking an exam:
Student A scores in the 97th percentile
Only 33.88% of students passed the exam
Find:
Student A's rank among the 245 people
I did the math myself given my limited knowledge, and got somewhere around…
0
votes
0 answers
Is dividing the median (50th percentile) by 2 an acceptable approximation of the 25th percentile?
So for example, if the median is equal to 0.840335, could I approximate the 25th percentile as $0.840335 / 2 = 0.4201675$?
Would this be possible if one assumes the underlying data is normally distributed?
Lucas
- 11
0
votes
1 answer
Finding percentile rank.
The problem goes:
Given the following table bellow:
\begin{array}{|l|c|c|c|c|c|c|c|c|c|c|}
\hline
\textbf{Data} & -10 & 25 & 37 & 40 & 43 & 54 & 111 & 113 & 146 & 168 \\ \hline
\textbf{Frequency} & 3 & 6 & 1 & 5 & 3 & 2 & 7 & 5 & 3 …
Andy R
- 1
0
votes
0 answers
Interpretation 0f percentile
How do we interpret the meaning of a percentile?
What I have learned from books is as follows: "If a score is the 40th percentile, this means that it is larger than 40% of the distribution, while the other 60% of scores are greater than or equal to…
Mahmudul Hasan
- 711