What is this Statistical Formula Used to Calculate?

  • Thread starter Thread starter thenokiaguru
  • Start date Start date
  • Tags Tags
    Formula
AI Thread Summary
The formula discussed is related to the two-mean hypothesis test, specifically for comparing the means of two groups. It calculates the difference between the sample means (x1 and x2) relative to the pooled standard deviation (s) and the sample sizes (n1 and n2). The formula is structured to assess whether there is a statistically significant difference between the two means. An attachment was provided for reference, and a link to a resource with similar formulas was shared for further clarification. Understanding this formula is crucial for conducting hypothesis testing in statistics.
thenokiaguru
Messages
1
Reaction score
0
great forum, been looking at some past papers and saw this formula in a stats paper - don't know what it is. i want to know as it is used to calculate a question. please help...
its put up as an attachment...

or...

t = x1 - x2 / s (√ 1/n1 + 1/n2)

the x's are x bar

thanks in advance...
 

Attachments

Last edited:
Mathematics news on Phys.org
Looked familiar, so I glanced around; it looks like the two-mean hypothesis test, where s_1 = s_2
(i.e. the formula I found for the two-mean hypothesis test was the same as yours, except the s was under the square root as s_1 and s_2 squared.)
Here:
http://www.duxbury.com/statistics_d/templates/student_resources/0534377556_woodbury/artfinal/Formulas/Formula%205.jpg
 
Last edited by a moderator:
Thread 'Video on imaginary numbers and some queries'

Thread 'Video on imaginary numbers and some queries'

Hi, I was watching the following video. I found some points confusing. Could you please help me to understand the gaps? Thanks, in advance! Question 1: Around 4:22, the video says the following. So for those mathematicians, negative numbers didn't exist. You could subtract, that is find the difference between two positive quantities, but you couldn't have a negative answer or negative coefficients. Mathematicians were so averse to negative numbers that there was no single quadratic...
View full post »

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »
Thread 'Unit Circle Double Angle Derivations'

Thread 'Unit Circle Double Angle Derivations'

Here I made a terrible mistake of assuming this to be an equilateral triangle and set 2sinx=1 => x=pi/6. Although this did derive the double angle formulas it also led into a terrible mess trying to find all the combinations of sides. I must have been tired and just assumed 6x=180 and 2sinx=1. By that time, I was so mindset that I nearly scolded a person for even saying 90-x. I wonder if this is a case of biased observation that seeks to dis credit me like Jesus of Nazareth since in reality...
View full post »

Similar threads

MHB Understanding Cubic Equation Formula for Polynomials of Degree Three
Replies
9
Views
3K
I Calculating the odds of drawing 3 "no" notes from a hat with 3 "no" and 3 "yes" notes
Replies
3
Views
1K
How Do I Calculate Confidence Intervals for Two Means?
Replies
1
Views
1K
I Alternating Harmonic Numbers are cool, spread the word!
Replies
4
Views
2K
MHB How can I calculate the union of two rotated rectangles using an algorithm?
Replies
8
Views
5K
I Convergence of this Laplace transformation
Replies
3
Views
2K
MHB Are These Statistics Practice Answers Correct?
Replies
1
Views
2K
I Find an explicit formula for this n-sum problem
Replies
7
Views
3K
MHB What are some useful math formula/reference sheets for different courses?
Replies
2
Views
3K
How to use formulas for a delta wing?
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top