Pdf Definition and 328 Threads

Hi guys! Homework Statement Do you know how to get the cdf and pdf of the absolute difference of two iid standard uniform X1 and X2 : X = |X1 − X2| ? Homework Equations Come across...

Hello, Suppose that we have the following set of independent and identically distributed RVs: \gamma_1,\,\gamma_2,\,\ldots,\,\gamma_M. Arranging them in descending order as: \gamma_{1:M}\ge\gamma_{2:M}\ge\cdots\ge\gamma_{M:M}. Now suppose we select the largest m\leq M order statistics. What...

How can I create a PDF file w/out buying anything? Why does adobe try to swindle you into buying something? It's cake on my Mac, but on my PC not so much. So what do you guys use? Thanks, Casey

Is there any free way to split PDF pages down the middle? I have a scanned PDF book with 2 pages on each page. Is there any way I could split the whole doc down the middle so there is 1 book page per page.

Hi, all, I am having a problem in calculating a randomly truncated pdf. Let x be a random variable, it's pdf f(x) is known. Let t1 and t2 be anther two random variables, their pdf f(t1) and f(t2) are known as well. Now, how do I compute the pdf f(x|t1<x<t2)? Thks a lot.

I have a pdf file and I need to save to disk only part of it, not the whole document. Does anyone know how to do that? I have the LaTeX file and I can of course LaTeX only part of the file but the problem is that the references in the part that I LaTeX are then not working since they refer...

Hi,all, I have a problem of computing pdf of some random variables. Assuming x1, x2... xN are some random variables. Now, I know the pdf of x1, which is f(x1). For the pdf of x2, it is given as a function of x1, in this case, how do I compute pdf of x2? Or, rather, how do I generate samples...

Hello, Suppose that: Z=X_1+X_2+X_1X_2 where X_i for i=1 and 2 are independent and identically distribuited exponential RVs. can we find the PDF of Z? Regards

I am confused as hell. If you look at exponential distribution at wikipedia or elsewhere, you can see that the pdf can attain values larger than 1. How is it possible? This basically implies that probability density of some value is larger than 1? :mad:

Hello, Is the relation between the PDF and CDF of order statistics is as any PDF and CDF. i.e.: F_X(x)=\int_{-\infty}^{x}f_X(t)\,dt Regards

Hello, I have this equation: \int_{-\infty}^{\gamma}f_X(x)\,dx+\int_{\gamma}^{\infty}F_Y(x-\gamma)\,f_X(x)\,dx where f_X(x) and F_Y(y) are the PDF and CDF of the randome variables X and Y, respectively. Now the question is: can I write the above equation in the form...

Is the expected value E[x]or E[y] of a bivariate pdf fXY(xy) \int x f(x,y)dx or E[y] \int y f(x,y)dy ? example if f(x,y) = x+y E[X] = \int x *(x+y)dx regards Brendan

Dear all, what are the differences between Caroll´s GR published book and the PDF text? Thanks, Goldbeetle

I'm having a lot of trouble figuring out the difference between a probability density function and a cumulative distribution function. Is the CDF just the integral of the PDF? Thanks in advance.

Joint PDF --> Marginal Pdf's Homework Statement Suppose that the random vector (X, Y ) has the probability density function (pdf) fX,Y (x, y) = k(x − y), if 0 < y < x < 1 0, otherwise. 1. Find the value of k, so that fX,Y (x, y) is a genuine pdf. 2. Find the marginal...

I'm not sure where to have put this question I hope it is in the right place. I have big problem with LaTeX.. I have been writing a document for a while and recently when I click the build and view button it shows this error [DocOpen(%bm.pdf")][FileOPen(%bm.pdf)] Cannot execute the...

I'm not sure where to have put this question I hope it is in the right place. I have big problem with LaTeX.. I have been writing a document for a while and recently when I click the build and view button it shows this error [DocOpen(%bm.pdf")][FileOPen(%bm.pdf)] Cannot execute the...

Hi. The question is: Given X, Y and Z are all continuous, independant random variables uniformly distributed on (0,1), prove that (XY)^Z is also uniformly distributed on (0,1). I worked out the pdf of XY=W. I think it's -ln(w). I have no idea at all how to show that W^Z is U(0,1). What...

I have been asked to determine the pdf given a DF. F(x) = 0 for x<0 F(x) = x^2/x for x 0<= x < 1 F(X) = x/2 for 1<=x<2 F(x) = 1 for x>= 2 Is the pdf the derivative of the df So if you wanted the probability of x between 0 and 1 The pdf would just be x ? regards Brendan

Homework Statement Hi. I need to insert this equation in a pdf file such that it doesn't cut off. How can I make it appear without cutting off? Homework Equations \noindent\(\sqrt{\frac{1}{2} e^{\frac{1}{2} \text{$\kappa $u} (-4 u+4 \text{u0}+\text{$\kappa $u})} \sqrt{\pi }...

Homework Statement I have a probability distribution function (PDF) going fromi 0 to a on the y-axis and 0 to 30 on the x-axis. The function describing the PDF is the quadratic equation f(x) = a+bx+cx^2 I have to find a, b, and c. Homework Equations The Attempt at a Solution...

A question which I amnot able to do...please help: Find the PDF of Y if X is a Gaussian PDF: fx(x) = (1e-x^2/2)/(2pi)^1/2 ; -infnity<x<+infinity Express your answer in terms of CDF of X gven by Fi(x) = Integral -infnty to + infnity((1e-x^2/2)/(2pi)^1/2) b) Sketch both the PDF, fY(y)...

I am looking for an application to not only view pdf's but also type side notes and highlight sections. This application must be compatible with my platform: Linux - Ubuntu-8.10. Thanks

Does anybody know what the pdf of a sine wave cycle is? Or perhaps how to derive it? The problem can be done numerically, but surely there is an analytic expression for this function? There is a numerical solution available at...

Cambridge press says available as of around 1 March, so in a couple of months. Samples are available of page proofs as they will, I gather, appear in the book. Here's the 3-page table of contents http://assets.cambridge.org/97805218/60451/toc/9780521860451_toc.pdf Here's an 11-page exerpt...

Hi all, I am new here. I have a problem about statistics: now I have two variable a & b, both of them are uniformly distributed in [-1 1], I want to find the pdf of the function f=|a-b|/|a+b|. Any hint is welcome, thanks a lot xiaoli

Hey all, My bibliography is not showing up in the PDF output, and I'm not sure why.. The bib file is in the same directory as the the main tex file. I am using the command: \documentclass[a4paper,twoside,11pt]{book} \usepackage{calc} \usepackage{setspace} \usepackage{graphicx}...

I'm trying to find some software (preferably free) which allows editing of pdf files in Windows XP. I don't need anything too fancy, just the ability to add/remove/reorder/resize pages, and to add and remove bookmarks. Anyone have any suggestions?

Homework Statement The exam grades in a certain class have a Gaussian PDF with mean m and standard deviation \sigma. Find the constants a and b so that the random variable y=aX+b has a Gaussian PDF with mead m' and standard deviation \sigma'. Homework Equations The Attempt at a...

Que. 1 Consider a Gaussian PDF with µ = 20, σ = 30, a = 50 and b =80. Determine i)Probability that P(x>b) ii)P(x ≤ b) iii)P(x ≤ - b) iv)P(a ≤ x ≤ b) Que. 2 In a certain manufacturing process only shafts whose diameters are less than 1.5 inches can be used. Given the shaft diameters are...

Homework Statement A function f( x ) had the following form : f ( x) = kx^-(k+1) where 1 < x < infinity a) for what values of k is f a pdf ? Homework Equations See attachments (the theorem is included) The Attempt at a Solution started out by using the first equation in the...

Question is what is the mode when all data are unique? have a set wherein the actual question is what is the inference about the PDF for the data? Median > mean but no mode...i was under the impression that PDF is only for a continuous measurements...when data set is unique...in which case it...

Determine constants A and B such that function f(x) is a valid PDF whose mean is 0.9 times its mode. f(x) = Ax- Bx ^3 , 0 <= x <= 2, otherwise = 0 Also calculate its mean,median and mode and plot the PDF Please help...am scratching my head...have the answers but cannot derive the...

how do i open a PDF file in the bash shell on a mac?

Homework Statement Let X1, X2, X3,...Xn be independent and indentically distributed with pdf f_X(x)= 4x^3 for 0 < x < 1 First I had to calculate the joint pdf of distribution of X1, X2, X3..Xn which I did I got 4(X1*X2*X3*...*Xn)^3 Which I'm hoping is correct. a) determine the...

halw could anyone help me in writing this project in MATLAB ?? A random variable X is observed at certain experiment. 100,000 samples of this random variable are stored in a vector called samples. 1. Use MATLAB to read the samples of this random variable. To read these samples you...

Can I "flatten" a pdf in Acrobat? In Adobe Acrobat you've got some drawing and markup tools. When using these, what happens is that whatever you draw is placed "on top" of the pdf. Also, when you print you need to specify that drawings/markups are to be included. Otherwise they're just ignored...

I'm doing a presentation for coursework, and would like to include some figures which are in other papers (on my computer in PDF format). What is the best way to get one of these images and include it in my document (latex)? I can just select it and copy/paste to an image file, but is there a...

Suppose one knows a probability density p(x) over a space X (where x\in X) and a conditional probability density p(y|x) over a space Y (where y\in Y). This implies the integral \int{p(x)dx} is well defined as well as \int{p(y|x)dy}. Defining a joint probability density p(x,y)\ =\ p(y|x)p(x)...

I am supposed to be sleeping but I re-woke up realising there was something I wanted to do today that I forgot. I'm sending you a pdf that you can use as posters, it is about internet protocols and their encapsulations. I hope you'll like them (now I go sleep). I have other cool stuff like these...

Does anyone here have one of these book readers? I want to know how good the 'experimental' PDF support is. For instance, will it display Alan Hatcher's Topology book?

Can anybody tell me the software name which changes a pdf file(text mode) which has been scanned and kept in pdf format actually i want to modify the data in that image ie one textbook has been scanned and that is put in pdf format I changed it into word with the converters(pdf to...

Can anyone tell me how to find the joint PDF of two random variables? I can't seem to find an explanation anywhere. I'm trying to solve a problem but I'm not sure where to go with it: Y is an exponential random variable with parameter \lambda=4. X is also an exponential random variable and...

Is there any pdf about Lagrangian Dynamics include problem and solution. Thanks...

Homework Statement Let X represent the random choice of a real number on the interval [-1,1] which has a uniform distribution such that the probability density function isf_{X}(x)=\frac{1}{2} when -1\leqx\leq1. Let Y=X^{2} a. Find the cumulative distribution F_{Y}(y) b. the density function...

Hi all, Any one can help me how to configure the Acrobat Reader so that we can view PDF files in different browsers? For example, we have two datasheets saved in pdf format, and we want to open to compare their specs. Thanks for any help! Mike

Homework Statement How do I create a PDF document with math symbols in it without spending a lot of money. Homework Equations The limit of my spending tends to zero. The Attempt at a Solution Should I just get acrobat and use the program I already own (rapid-pi) which helps to...

Hi, I'm tying to solve the fourth moment of pdf of standard normal pdf. meanwhile, i have to break this one: how to get the result of integral of x exp (x) dx. that would mean a great difference to me. thank you.

Now if I want to attach my mathematica notebook to the pdf what would I have to enter in LaTeX?

I am looking at values of a sinusoid, y = A sin(2*Pi*f*t), oscillating between A and -A at a frequency of 25 Hz over 0.650 milliseconds. If I find the histogram of the sinusoid, is this the same thing as the probability density function of that sinusoid? If this is not the case, what does...