Logistic regression | Likelihood and deviance

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In this video, we will learn how to calculate the likelihood and the deviance based on some simple example data.
1. Example data
2. Binomial and bernoulli distributions (02:32)
3. Likelihood (05:48)
4. Maximum likelihood (09:38)
5. LL of the null and the saturated model (11:04)
6. The deviance (14:02)
7. McFadden's pseudo R2 (15:30)
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You have done a fantastic job explaining the details! Thank you! Your video is one of the top videos on YouTube on the topic.

romaniup
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If someone just using equation and abstract dataset, I will be completely lost, so I really like the way you explained the concept, by using detailed and realistic dataset, with such plenty and friendly arrows to indicate the positions we should focus, it significantly help me to get fully understanding of it.

sasakevin
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Man, that's a great explanation. I'm preparing for a test at the uni regarding logostic regression and you saved me a lot of time I would need to spend on reading a statistics book.

mateusztaflinski
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Very very good complement material for an analysis course I am taking! Thank you soooo much!

rosemo
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Very good and clear explanation, 1:28 The P(Cancer) nominator should be e(BX)

kahmengsoh
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Huge thanks
Can we say the pseudo-r-square is the same as deviance ratio that is reported in some statistical packages after logit models

VivekGupta-shlj
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Hi Sir,
Please provide videos gradient descent and ascent in case of possible.
Which can help us more.

ratnakarbachu
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Hi, thank you so much for the great videos. Quick question about the interpretation of residual deviance. I understand the lower the value, the better. Is it because the LL (proposed model) inside the residual deviance formula follows the same principle? Thanks in advance

datascience
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thanks for the great video! at 11:32 why b0 is 0 at null model? could you please illustrate? many thanks!

Tyokok
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Great job! So, the null model of logistic regression is essentially always that both outcomes have an equal probability of happening? The null model is it's all due to chance?

brazilfootball
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Uhmm sir, my proff. Stole your slides and he is teaching us of them is that legal?

shwamzad
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I can't understand how obtain -5.754 and 2.747.

giuseppepersico
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I still don't know how b0=-5.747 and b1=2.747. I used cancer=1 and healthy=1 on the dataset and i have b0=1.5 and b1=1.25

DUYTRẦNVIẾT-nt