0
votes
1answer
24 views

Interpretation of a statistical formula involving the ratios of sample and population

Kind of an odd question, but, is this a standard equation for stats? I can't figure out for the life of me what it looks like. $\left(\frac{\text{Sample Of A}}{\text{Population Of ...
3
votes
1answer
51 views

How does research in math differ from research in statistics?

I'm at a crossroads where I'm considering switching my major from electrical engineering to math, because quite frankly, I'm just not getting enough math to satisfy my passion from engineering. While ...
2
votes
3answers
81 views

“Practical” Claim about Hypothesis Testing of Bernoulli Distribution Parameter

First, let me state the original problem (in my own wording): Describe the decision procedure for testing the hypothesis about the parameter $p$ (success rate) of a Bernoulli distribution. The ...
0
votes
3answers
61 views

Conceptually: A set whose elements can only be probabilistically characterized?

Sorry for the informality here, but was musing over the basic concepts around describing a set in real world usage: A finite set of explicitly named elements, this apple and that apple, nothing more ...
1
vote
1answer
42 views

Literature on Sabermetrics in baseball

For my bachelor's thesis, I would like to study the use of Sabermetrics in baseball. I was fascinated by the book 'Moneyball: The Art of Winning an Unfair Game' by Michael Lewis, and to me, it ...
0
votes
0answers
25 views

A measurement of “likelihood” of a roll of $n$ independent normal random variables

I'll start with a general question, and later, as I expect it is possible that the general case does not have a satisfying answer, I'll post my specific problem. I am trying to find some measurement ...
1
vote
0answers
22 views

Crunching some data on grades

Given a set of data that is not already paired but is known to not be independent, are there any valid methods of statistical analysis one can perform? The purpose of my analysis is to compare ...
1
vote
0answers
15 views

Compare Unequal Entities

This is more of like an analytic question. It could be vague but let me try to narrow it down a little. Assuming, i am working on an analysis in primary education which include factors like ...
13
votes
3answers
2k views

The Best Strategy and Highest Possible Score for the “Threes!” Game.

[There's still the strategy to go. A suitably robust argument that establishes what is statistically the best strategy will be accepted.] Here's my description of the game: There's a $4\times 4$ ...
1
vote
1answer
187 views

T table with infinity degrees of freedom

why is z table the same as a t table with infinity degrees of freedom. For example as df for the T distribution goes to infinity it becomes z ( standard normal) distribution. Is this true and why is ...
1
vote
1answer
83 views

Statistics Motivated by Mathematics

Short version: Anyone have any favorite examples of "mathematically-motivated statistics," and possibly a textbook that would appeal to me? Long version: I have a pretty reasonable mathematics ...
2
votes
5answers
105 views

I am going to learn these Mathematics Topics. I need advice and suggestions please .

I am really horrible when it comes to maths since I never had any maths background in my High school. I am fairly good at programming ( C++ and Java) but without mathematics I cant advance in any ...
0
votes
1answer
34 views

Are SAT scores considered discrete? If so, then can we use the normal distribution?

I believe the definition of a normal distribution only applies to continous random variables. But SAT scores are normally distributed and the possible values of an SAT score are discrete.
2
votes
3answers
69 views

Esoteric knowledge regarding statistic tests like $F$-test, $t$-test and $X^2$ (Chi-Square) etc.

For a year or two I've been doing/learning statistics using books written both for engineers and semi-professionals. I know how to apply most of the theory that statisticians use on job, but I'm still ...
3
votes
0answers
75 views

What is the most relavant math for statistics students?

As they say "the more math you learn the better". Unfortunately, I did not have a lot of mathematical training in my undergraduate. Now I am doing a master in mathematics, mainly to make up some ...
3
votes
1answer
394 views

Real Analysis and Statistics

What level of real analysis do you think is desirable for the study of statistics? I know that for many statisticians with applied focus, rigorous mathematics tend to give them a headache and I am ...
2
votes
4answers
181 views

Stats is not maths?

How mainstream is the claim that stats is not maths? And if it's right, how many people don't agree? Given that it's all numbers, taught by maths departments and you get maths credits for it, I ...
2
votes
1answer
123 views

Explaining probability theory versus statistics

I'm not sure whether this question was asked before, but it's hard to search because of lots and lots non-descriptive titles like "statistics and probability". The context: There is an anecdote I ...
0
votes
0answers
93 views

Understanding degrees of freedom in a standard linear model

So I'm taking a class in applied regression analysis right now, and it is being taught with no theory whatsoever. I am TOTALLY lost on the concept of degrees of freedom. All I've been told / can find ...
4
votes
3answers
1k views

Improbable vs Impossible?

I was wondering how mathematics in general or any of its sub fields e.g.statistics, probability, define the words Improbable and Impossible. I get their English meaning, that something is impossible ...
3
votes
4answers
190 views

Is math capable of predicting social evolution?

By the way math and statistics are evolving, it seems possible to me that with time, and as the population increases, we are going to be able to create mathematical models that predict social ...
4
votes
2answers
195 views

Does introducing penalties for getting true/false questions incorrect result in higher skill penetration (less luck/variance)?

A student is asked to answer 50 true/false questions and he would get 35 right and 15 incorrect if he had to put his best guesses for each question down. Now, for each question he has a certain ...
7
votes
2answers
271 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 ...
5
votes
3answers
244 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 ...
1
vote
1answer
48 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 ...
4
votes
2answers
295 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, ...
3
votes
5answers
625 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 ...
1
vote
0answers
116 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 ...
0
votes
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 ...
7
votes
3answers
206 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 ...
0
votes
1answer
185 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?
5
votes
4answers
3k 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 ...
4
votes
0answers
473 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 ...
2
votes
3answers
90 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 ...
2
votes
2answers
150 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 ...
3
votes
1answer
477 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 ...
9
votes
4answers
580 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 ...
1
vote
0answers
1k 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 = ...
2
votes
1answer
188 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 ?
12
votes
5answers
2k 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 ...
30
votes
10answers
2k 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.