Join experts in discussion on Set Theory, Logic, Probability, Statistics topics. Fundamentals in Set theory, logic and proofs. Probability and statistics also. Homework help is available.
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Undergrad How many possible passwords from 10-15 alphanumeric characters?
- Omnis
- · Replies 18 ·
Graduate Induction with more than one variable
- µ³
- · Replies 5 ·
High School Can an empty relation be a function?
- luizgguidi
- · Replies 3 ·
High School Solving the Coin Flips Problem - Probability of Tails After 9 Heads
- joebloggs
- · Replies 3 ·
Graduate Mandelbrot Set: Why Are Julia Sets Connected?
- Troels
- · Replies 1 ·
Undergrad Mean value theorem proof for derivatives
- transgalactic
- · Replies 2 ·
Graduate How many permutations leave an element unchanged?
- Pi
- · Replies 6 ·
Undergrad How Many Ways to Partition N Balls into Subgroups with a Maximum of k Balls?
- guyov1
- · Replies 1 ·
Undergrad What is the distribution density function for a normal random variable?
- sampahmel
- · Replies 1 ·
Undergrad How Do You Calculate Probabilities for Normally Distributed Scores?
- apoechma
- · Replies 4 ·
Undergrad Where Can I Find Jarque-Bera Critical Values for My Textbook?
- carlson
- · Replies 1 ·
High School How Does Bacterial Population Change Over Time?
- mahi687
- · Replies 4 ·
Graduate Why are models of the natural numbers important in set theory?
- SW VandeCarr
- · Replies 16 ·
Undergrad Mean and s.d. of product of two variables
- Monique
- · Replies 2 ·
Undergrad Is the d(A,B) Function a Valid Metric for Finite Sets?
- birulami
- · Replies 4 ·
Graduate How Can V Be Transformed into Different Algebraic Structures?
- Dragonfall
- · Replies 3 ·
Graduate Applying Bayes' theorem with test false positive and negative rates
- Marione
- · Replies 3 ·
Graduate Calculating Conditional Probability for a given Event (a=1)
- hughwf
- · Replies 1 ·
Undergrad Determining the Likelihood function
- daviddoria
- · Replies 3 ·
Graduate Finding the flaw in a proof that symmetric and transitive implies reflexive
- Pere Callahan
- · Replies 3 ·
Graduate Two similar Bayesian problems. Did I get them right?
- Fredrik
- · Replies 6 ·
Undergrad Proving Elements of a Set are Distinct
- JG89
- · Replies 3 ·
Undergrad Why is 'k' Used in Complete Graphs?
- michael1x5
- · Replies 2 ·
Graduate Expectation of 2 random variables
- kingwinner
- · Replies 5 ·
Undergrad Calculating Expected Value of Oil Co. Offshore Drilling Bid
- cronxeh
- · Replies 2 ·
High School Is there any numbers with infinite digits
- amature83
- · Replies 4 ·
Graduate What happens when you multiply two independent normal random variables?
- chota
- · Replies 4 ·
Undergrad Solving Probability Question: Rolling 2 Die's w/ 20 Faces - Answer 21/160
- Gib Z
- · Replies 4 ·
Undergrad How does the induction step actually prove s(k+1) is true?
- VanKwisH
- · Replies 5 ·
Undergrad What does the binomial coefficient notation mean in the binomial theorem formula?
- MadmanMurray
- · Replies 4 ·
Undergrad The Sigma Terminology in Data Plots: Confusion and Questions
- Lorna
- · Replies 2 ·
Graduate Is the Correlation between XY and Y Zero if X and Y are Independent?
- rhuelu
- · Replies 1 ·
High School What is the Converse in a Conditional Statement?
- kmeado07
- · Replies 1 ·
Undergrad Do you consider probablity a true science?
- bchandler
- · Replies 5 ·
Undergrad Probability airplane returns in 30 or 40 minutes given not back in 20
- lehaihua
- · Replies 1 ·
Graduate Probability Q: Average Consecutive Matches in Bit Strings
- dabd
- · Replies 4 ·
Undergrad Standard Card Question - Probability
- apoechma
- · Replies 4 ·
High School Probability of John finishing in top 3 given Bill finishes
- apoechma
- · Replies 4 ·
Undergrad Set Theory Book Reviews: Halmos Edition
- Reedeegi
- · Replies 2 ·
Undergrad Solving the Waiting Time Paradox: Uniform Arrivals
- f4ithfullg1rL
- · Replies 1 ·
Undergrad Calculate the chance books will be returned to library
- apoechma
- · Replies 10 ·
Graduate Problems involving two distributions
- Travis Cooper
- · Replies 1 ·
Undergrad Bijective Function: f: [0,1] --> [0,1]
- CarmineCortez
- · Replies 1 ·
Undergrad Probability Question - POLITICS?
- apoechma
- · Replies 1 ·
High School Finding the Value of Y at X=3 with No Reading of Y
- pjunky
- · Replies 1 ·
Graduate Linear Gaussian parameter estimation
- aydos
- · Replies 2 ·
High School Probability (Choose) question - marbles in a jar
- glog
- · Replies 1 ·
Undergrad Random number generator of 2 normal distributions partially correlated
- statwannabe
- · Replies 1 ·
Undergrad Tasting Experiment - Can Friend Distinguish Pepsi from Coke?
- musicgold
- · Replies 1 ·
Graduate Derivation of bayesian inference in Hidden Markov model
- zyh
- · Replies 19 ·
Graduate Proving Y is a Markov chain when Y_k = X_2k
- stochfreak
- · Replies 1 ·
Undergrad Is f(x)=x³-x+1 bijective on (-∞,-1] like it is on [1,∞)?
- Nok1
- · Replies 7 ·
Graduate Is the use of complete induction advantageous in this proof?
- snipez90
- · Replies 3 ·
Undergrad What does P[|X-0.5|<0.25] mean for a probability distribution?
- ahamdiheme
- · Replies 2 ·
Graduate Simplifying the sum of M!exp((M-2N)a)/(N!(M-N)!) from N=0 to M
- olechka722
- · Replies 2 ·
Graduate Can infinite sets differ finitely?
- Loren Booda
- · Replies 11 ·
Undergrad What is the Probability of 4 Out of 5 Recent US Presidents Being Left-Handed?
- Pumblechook
- · Replies 4 ·
Undergrad Why does the author say 1 of 20 people will experience a coincidence in a year?
- musicgold
- · Replies 2 ·
Graduate Are the epsilons independent from each other?
- St41n
- · Replies 2 ·
Graduate Is the empty set a compatible subset of a dense set?
- SW VandeCarr
- · Replies 32 ·
Undergrad Why is my full house probability calculation 3000 instead of 300?
- chriszhao
- · Replies 2 ·
Graduate Continuous Function: Showing f is Continuous
- CarmineCortez
- · Replies 2 ·
Graduate About the joint density function
- simpleeyelid
- · Replies 5 ·
Graduate How to Prove E[Y|F0]=Y When Y is F0-Measurable?
- umutk
- · Replies 2 ·
Graduate What are random operators on measure spaces?
- adnan jahan
- · Replies 1 ·
Undergrad Probability that 10 out of 15 random stocks are winners
- musicgold
- · Replies 4 ·
Graduate Lebesgue measure vs. box counting dimension
- Coin
- · Replies 1 ·
Undergrad Notation for representing vector spaces
- Werg22
- · Replies 1 ·
Graduate R Chart with probability limits
- abhipatel
- · Replies 2 ·
High School Are {a,b,c} and {a,{b,c}} the same set?
- tgt
- · Replies 6 ·
Undergrad Unsolved Problem: Are Outcomes of Two Inspectors Independent?
- hypermonkey2
- · Replies 5 ·
Graduate Deciding Between Standard and Improved Chi-Square Methods for Data Analysis
- Lorna
- · Replies 2 ·
Graduate Can You Have a Category of Categories Without Encountering Russell's Paradox?
- Diffy
- · Replies 1 ·
Undergrad Generated random data how can I check if it is a Gaussian?
- raisin_raisin
- · Replies 3 ·
Graduate How to Prove the Sum of Squared Standard Normal Variables is Chi-Square?
- stattheory
- · Replies 1 ·
High School What does finite mean in mathematical terms?
- curiousnoob
- · Replies 11 ·
Graduate Probability of bivariate rectangle in terms of joint CDF
- pluviosilla
- · Replies 11 ·
Graduate Proving nCr is always an integer by induction
- sgnagni
- · Replies 38 ·
Graduate Some questions regarding Propositions and the Liar's Paradox.
- TheDarkElf
- · Replies 3 ·
Undergrad Mathematical Derivation of Significant Figure Rules
- jrtayloriv
- · Replies 5 ·
Graduate Why can't well-ordering be expressed in first-order logic?
- Semo727
- · Replies 8 ·
Undergrad Probability Puzzle: Calculating Chances of Being Hit by Car After 10 Crossings
- rwinston
- · Replies 2 ·
Undergrad Gaussian PDF: Probability of P(x), Usable Shafts %
- axnman
- · Replies 3 ·
Graduate Joint probability from conditional probability?
- Demystifier
- · Replies 10 ·
Graduate Set theory and category theory
- tgt
- · Replies 7 ·
Undergrad How do I state uncertainty when calibrating a flowmeter?
- robsmith82
- · Replies 1 ·
Undergrad Determining the Importance of Certain Data Types (PCA?)
- Pighead
- · Replies 3 ·
Undergrad Normalizing standard deviation between two data sets
- TheAnalogKid83
- · Replies 5 ·
High School Obtain the power set p(s) if S(a,b,c)
- judex
- · Replies 1 ·
Undergrad Entropy (Shannon) - Channel Capacity
- frozz
- · Replies 3 ·
Undergrad Can I Plot Log (x) with Error Bars without Changing err_x Values?
- Lorna
- · Replies 6 ·
Undergrad How can I calculate an error for a slope in my lab report using Excel?
- WarPhalange
- · Replies 1 ·
Undergrad How to proof P(A U B U C) without using Venn Diagram
- ooooo
- · Replies 5 ·
Graduate How Can Predicate Calculus Prove a Unique Solution in Set Theory?
- poutsos.A
- · Replies 1 ·
Graduate What are the axioms in ZFC set theory?
- poutsos.A
- · Replies 20 ·
High School Is the Empty Set Its Own Element or Subset?
- VanKwisH
- · Replies 20 ·
Undergrad Attempting to find an equation, not sure how to present it.
- ultimablah
- · Replies 4 ·
Graduate What is the Representation of \omega^\omega in a Visual Form?
- Dragonfall
- · Replies 13 ·
Undergrad Normal approx binomial question.
- Shawj02
- · Replies 1 ·
Undergrad Correct Combination Thought Logic Being Followed
- iamhumble
- · Replies 4 ·