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Odds ratio
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- An odds ratio (OR) is a statistic that quantifies the strength of the association between two events, A and B.
en.wikipedia.org/wiki/Odds_ratio
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An odds ratio (OR) is a statistic that quantifies the strength of the association between two events, A and B.
The term “Or” in statistics is a logical operator that is used to connect two or more statements or conditions. It is fundamental in probability theory and data analysis, allowing statisticians to determine the likelihood of at least one of several events occurring.
- Definition
- Examples For Small Values
- A Special Case
- More Advanced Calculations
The definition of the factorial is that for any positive whole number n, the factorial: n! = n x (n -1) x (n - 2) x . . . x 2 x 1
First we will look at a few examples of the factorial with small values of n: 1. 1! = 1 2. 2! = 2 x 1 = 2 3. 3! = 3 x 2 x 1 = 6 4. 4! = 4 x 3 x 2 x 1 = 24 5. 5! = 5 x 4 x 3 x 2 x 1 = 120 6. 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720 7. 7! = 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5040 8. 8! = 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 40320 9. 9! = 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x ...
One other value of the factorial and one for which the standard definition above does not hold is that of zero factorial. If we follow the formula, then we would not arrive at any value for 0!. There are no positive whole numbers less than 0. For several reasons, it is appropriate to define 0! = 1. The factorial for this value shows up particularly...
When dealing with calculations, it is important to think before we press the factorial key on our calculator. To calculate an expression such as 100!/98! there are a couple of different ways of going about this. One way is to use a calculator to find both 100! and 98!, then divide one by the other. Although this is a direct way to calculate, it has...
X: used to represent the raw scores in a group. Thus if you have five scores, NX = 5, and åX means ("add together all the X scores"). N or n means the number of scores or individuals in a group. Thus if you have 6 scores, n = 6 and n-1 = 5. "NX" means "the number of scores in group X".
Jun 18, 2024 · Typically, Greek letters describe population information, while Latin (or Latin-looking) letters represent sample information. Latin Alphabet. Aa, Bb, Cc, Dd, Ee, Ff, Gg, Hh, Ii, Jj, Kk, Ll, Mm, Nn, Oo, Pp, Qq, Rr, Ss, Tt, Uu, Vv, Ww, Xx, Yy, Zz. Greek Alphabet. The highlighted letters are letters we use in this book.
Mar 26, 2023 · In general, statistics is a study of data: describing properties of the data, which is called descriptive statistics, and drawing conclusions about a population of interest from information extracted from a sample, which is called inferential statistics.
