# Tagged Questions

1answer
48 views

### Applications of information geometry to the natural sciences

I am contemplating undergraduate thesis topics, and am searching for a topic that combines my favorite areas of analysis, differential geometry, graph theory, and probability, and that also has ...
3answers
78 views

### Statistics Workshop for High School Students

We are going to hold an introductory workshop about the statistics. The participants will be students who have just finished their 8th or 9th grade. The workshop consists of 10 two-hour sessions. The ...
1answer
30 views

### Field of mathematics which deals with similarity of a set of objects each with property variables

(Contextual word of warning: Question written by mathematical novice.) I have a large set of objects. Each object has three variables. Each variable is a number between 0 and 1. For each object in ...
0answers
27 views

### Likely related elements

I have lists of pair like so : KHLM1800, (a,b,c) KHLM1900, (a,b,d) KHLM1840, (a,b,c,d) KHLM1845, (a,b,c) TCMB9001, (a,c) . . . Naively it looks like KHLM ...
0answers
18 views

### What is the real-world intuition of a data set that exhibits a gamma distribution with shape>1?

From the special case of the exponential distribution (shape=1), we know that the interpretation of scale has to do with the rate of the success, but how can I interpret the shape? Does it mean that ...
2answers
68 views

### Intuition Of Conditional Probability Equation

I was wondering if any one of you had any intuitive insight regarding the conditional probability equation, $P(A\mid B) = \large \frac{P(A \cap B)}{P(B)}$. In my textbook, they give a mere definition, ...
1answer
23 views

### Box Plot Log Scaled?

When making box plots to represent data, is it logical to set our axis scale to logarithmic? Or does that defeat the whole point of a box plot?
4answers
187 views

### Math vs Probability vs Statistics

For a certain job interview, I gave myself a 6 in SQL and 8 in Statistics. I love math and probability but I always found significance testing and confidence intervals rather dry. What is the ...
0answers
74 views

### Can a batsman's score be predicted in the sport of cricket?

I was browsing The Signal and the Noise in bookstore and chanced upon a chapter about predictions in baseball and found out about Moneyball and sabermetrics. I understand the closest to predicting a ...
1answer
189 views

### In general, is it easier to solve problems that have random variables, or problems that are basically the same that don't [closed]

This question is asked because I don't understand how random variables will affect various math problems, and knowledgeable mathematicians would. By easier, we mean less steps If we make our own ...
2answers
48 views

### Averages and Team

I have a question: Suppose $5$ players each score an average of $10$ points per game. Then collectively, do they score on average $50$ points per game? So player 1 scores an average of 10 points ...
3answers
146 views

### How come in statistics there is very little justification for the formulas used and proofs are almost nonexistent [closed]

I don't understand why people accept certain formulas in statistics without a mathematical proof style argument. You see this a lot in statistics textbooks and unfortunately this spills over with the ...
1answer
116 views

### Name of probability distribution

Does this distribution have a name: $f(x) = yx^{y-1}$ for $0 < x<1$ and $y>0$? It looks like an exponential distribution. Or is it a nameless distribution?
4answers
1k views

### What is the purpose of the standard deviation?

I don't have any knowledge of statistics beyond high school common sense. Why is the standard deviation usually seen in combinatorics textbooks, and why is the standard deviation defined ...
0answers
316 views

### How did Target figure out a teen girl was pregnant before her father did?

First of all I do not have a mathematics degree only a B.S. in finance so please take that into account when writing an answer. Generally what type of mathematics is involved here? And specifically ...
0answers
53 views

### Sufficient statistics for Data Cleaning

If you want to do data cleaning (e.g. suppose you have 1000 data points), is finding sufficient statistics a good thing to do? Because this seems to reduce the extra noise of the data.
3answers
84 views

### z-interval and sample size what is a normal sample size

Can a Z-interval be used when the sample size is between 15-30? does the variable play a role? I'm not too sure if it makes a difference. I know it can be used if the population is a normal or large ...
2answers
130 views

### A theorem about inductive inference

In the book 'Introduction of the theory of Statistics' by Mood,Graybill,Boes (third edition)on page 220 (Chapter 6 on Sampling) you can read: 'Inductive inference is well known to be a hazardous ...
1answer
302 views

### Single number to represent a ratio?

There's probably a very simple answer to this, but I can't put my finger on it. I have two numbers. I want one to be large, and the other to be small. I'd like to identify these with a single ...
4answers
463 views

### What is the deepest / most interesting known connection between Trigonometry and Statistics?

I'm teaching both at the same time to different classes in high school, so I just wondered about this. Added by OP on 16.May.2011 (Beijing time) I mean Statistics only, without Probability. In ...
0answers
612 views

### Calculate relative contribution to percent change

Let me use a simple example to illustrate my problem. First, assume we are calculating rate r at time t such that rt = xt / yt. Furthermore, each measure has two component parts: X = xa + xb and Y = ...
1answer
186 views

### Is the above statement true for maths?

In maths, you can use something as simple as statistical analysis to intuit the theory, and in comp-science you can use simulators. Is the above statement true for maths ?
4answers
792 views

### Why does Benford's Law (or Zipf's Law) hold?

Both Benford's Law (if you take a list of values, the distribution of the most significant digit is rougly proportional to the logarithm of the digit) and Zipf's Law (given a corpus of natural ...
8answers
984 views

### Real life usage of Benford's Law

I recently discovered Benford's Law. I find it very fascinating. I'm wondering what are some of the real life uses of Benford's law. Specific examples would be great.
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