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Palash Nandi
Palash Nandi

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Apr 8, 2022

Laplace Smoothing

Let’s create a story line in order to understand Laplace Smoothing correctly. A sports coach (SC) has a team of 10 players from P0 to P9 ( check in Figure 1 ) to train for upcoming tournament. SC wants each of the player to practice hard. SC is absolute intolerant…

NLP

2 min read

Laplace Smoothing
Laplace Smoothing
NLP

2 min read


Apr 27, 2021

Mathematics behind Logistic Regression

So., for Logistic Regression, the LHS ≠ RHS.

Logistic Regression

1 min read

Mathematics behind Logistic Regression
Mathematics behind Logistic Regression
Logistic Regression

1 min read


Apr 26, 2021

…ile odds ratio can vary between 0 to positive infinity, log (odds ratio) will vary between [-∞, ∞]. Specifically when odds ratio lies between [0,1], log (odds ratio) is negative.

‘Logit’ of Logistic Regression; Understanding the Fundamentals
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7

Saptashwa Bhattacharyya

Hi., Lets take two case,

Hi., Lets take two case, Case_1: p = 0.9 then odd_1 = 0.9/0.1 =9 Case_2: p = 0.5 then odd_2 = 0.5/0.5 = 1 now odd ratio = 9/1 = 1 which violates the range [0,1]. Am I missing something ?

1 min read

1 min read


Apr 9, 2021

Co-Variance in Words

Covariance is the concept of variance to multiple random variables. Instead of measuring the fluctuation of a single random variable, the covariance measures the fluctuation of two variables with each other. Var[X+Y] = Var[X] + Var[Y] + 2.XY.Cov(X,Y) ?

Covariance

2 min read

Co-Variance in Words
Co-Variance in Words
Covariance

2 min read


Apr 8, 2021

Expectation i.e. ‘E[X]’ in Words

A Random variable is a variable whose value is determined by some random event. The Expectation of random variable ‘X’ i.e. E[X] is the central tendency of X when picked once randomly from the sample space (i.e. a homogeneous/ heterogeneous space of all possible outcome). E[X+c] = ?

Expectations

2 min read

Expected values in Words
Expected values in Words
Expectations

2 min read


Apr 7, 2021

Variance, in Words

Let’s assume L is a population set. Variance of L tells, How much scattered data points of L are from L’s Mean(u). Also,

Variance

2 min read

Variance, in Words
Variance, in Words
Variance

2 min read


Jun 18, 2020

Demystify p-value, α and Degree of Freedom in Statistics using Examples

Disclaimer : All characters and scenarios are imaginary. It has no relation with practical data. Scenario 1 Let’s create a scenario to understand the concepts better. One day I found my friend ‘L’ boasting about himself that he can run for 1.5 hours straight without a break ( but he always feels…

Statistics

2 min read

Statistics

2 min read

Palash Nandi

Palash Nandi

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