Free Math Help Forum » Probability / Statistics
331 FOLLOWERS
This section of Free Math Help is a place to discuss Probability and statistics and get answers to all your questions. Get to know the expected value of various items, the Joint Probability Density Function, Properties of Independent Events, and Statistical Analysis of categorical data, and share your normal distribution question.
Free Math Help Forum » Probability / Statistics
11h ago
Revising probability and came across this exam question with no solution
I attach question and my attempt at the answer
Hopefully I have got it mostly correct but would appreciate your thoughts ..read more
Free Math Help Forum » Probability / Statistics
1d ago
A standard model Lagrangian encoding function is my obvious conclusion, and likely your conclusion too. However, this could be disputed by the cubic quartic polynomial of a kolmogorov-solomonoff-chaitin complexity proving the exponentiation of lim (i/g) = lim f/lim gh qr.
What's your solution ..read more
Free Math Help Forum » Probability / Statistics
2d ago
Hello everyone,
this statement was given in my econometricy textbook. I do understand why the variance of Y bar would be var(Y)/n. Unfortunately, I struggle to understand how one can derive the factor 1.25 from a weighted mean distribution. Could someone please help me out on that one ..read more
Free Math Help Forum » Probability / Statistics
2d ago
This isn't homework or anything but I'm trying to calculate the probability that I will have Spanish and German back to back (in either order), I've tried to solve this myself but I haven't learned this in school yet and am stuck. I have seven classes, and assuming that every possibility of class orders is equally possible, what is the probability that in any given year, I have German right after Spanish or Spanish right after German? Thanks ..read more
Free Math Help Forum » Probability / Statistics
3d ago
I am reviewing some basic statistics.
From a youtube lecture: "What is the Central Limit Theorem in Statistics? - Part 1"
The instructor quoted the following theorem:
"If the population is normally distributed, then the sample means will have a normal distribution regardless of size"
1. Does that mean that for each individual sample size distributions will themselves be normally distributed ?
2. Or does it mean that the sampling distribution of the sample means will...
Read more ..read more
Free Math Help Forum » Probability / Statistics
3d ago
Find z such that 5.5% of the standard normal curve lies to the left of z. (Round your answer to two decimal places ..read more
Free Math Help Forum » Probability / Statistics
3d ago
Came across this question in past exam paper and not certain under what subject this type of question comes under
Can someone help and steer in right direction ..read more
Free Math Help Forum » Probability / Statistics
3d ago
Free Math Help Forum » Probability / Statistics
1w ago
Lets say you have two very big numbers X and Y and the number of digits for each respectively is m an n.
now lets multiply X and Y
X*Y=Z
is there then a formula of m and n that predict the number of digits Z has?
I know this has something to do with carrying over but since i dont have a big background in math i cant quite figure it out. If there even is such a formula.
If anyone knows it would be really helpfull ..read more
Free Math Help Forum » Probability / Statistics
1w ago
I have a problem with the following question:
A small lottery consists of 200 tickets. There are two prizes. The first prize ticket is drawn and then, without replacement, the second prize ticket is drawn. If you buy two tickets, what are your chances of winning
a) first prize
b) both prizes?
My answers for the above questions would be:
a) 1/200
b) (1/200) X (1/199) = 1/39800
But the answer section in the book says:
a) 1/100
b) (1/100) X (1/199) = 1/19900
I don't understand why the...
Read more ..read more