# Questions tagged [statistics]

For questions that relate to probability or measurements, either outputting or parsing.

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56answers
4k views

### Compute the Median

Challenge Given a nonempty list of real numbers, compute its median. Definitions The median is computed as follows: First sort the list, if the number of entries is odd, the median is the value in ...
32answers
3k views

### Calculate Standard Deviation

Challenge Given a list of numbers, calculate the population standard deviation of the list. Use the following equation to calculate population standard deviation: Input The input will a list of ...
2answers
1k views

### The PPCG Handicap System

As we all know, meta is overflowing with complaints about scoring code-golf between languages (yes, each word is a separate link, and these may be just the tip of the iceberg). With so much jealousy ...
22answers
2k views

### Frequency Distribution of Multiple Dice Rolls

Given two positive integers a and b, output the frequency distribution of rolling a b-sided ...
21answers
1k views

### Mode length of a sentence

The task is simple. You are given a string with alphabetical words (say "Hello world, this are tests"). You have to return the mode of the lengths of ...
4answers
270 views

### Find the smallest number of participants with resulting percentages

Programs often list outcome statistics, such as this: 54% of participants received an award 69% of participants got a promotion 85% of participants increased their salary These percentages are the ...
22answers
2k views

### Frequency Distribution of Mixed Dice Rolls

A follow-up to this challenge Given a set of mixed dice, output the frequency distribution of rolling all of them and summing the rolled numbers on each die. For example, consider ...
36answers
2k views

### An Array of Challenges #3: Moving Averages

Note: This is #3 in a series of array-manipulation challenges. For the previous challenge, click here. Moving Average of a List The moving average of a list is a calculation resulting in a new, ...
9answers
1k views

### Fivenum and a little bit

(a paradox, a paradox, a most ingenious paradox) This is the first part of a multipart series inspired by different R functions. The Task Given a dataset $D$ of positive integers, I need you to ...
1answer
350 views

### Iterated Moving Average

If we have a list, say the list [9, 2, 4, 4, 5, 5, 7], we can do a moving average across it. Taking a window of say, 3 elements, each element is replaced by a ...
1answer
4k views

### Calculate the average and standard deviation, rubiks cube style

Introduction When solving a rubiks cube, one often write down the times like this 11.91, (11.28), (12.32) This is called a average of 3, while a average of 5 ...
5answers
499 views

### Fun with strings and string lengths

Introduction Inspired by Dyalog Ltd.'s 2016 student competition. The challenge there is to write good APL code, but this is a code-golf and it is open to all languages. Derived from this closed ...
9answers
693 views

### Calculate the correlation coefficient

Given a series of numbers for events X and Y, calculate Pearson's correlation coefficient. The probability of each event is equal, so expected values can be calculated by simply summing each series ...