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1
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You are at a Casino and have two dices to play with
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
data-probability
+1
vote
1
answer
A box has 12 red cards and 12 black cards. Another box has 24 red cards and 24 black cards.
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
probability
+1
vote
1
answer
Describe Markov chains?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
markov-chains
markov-algo
+2
votes
1
answer
Walk through the probability fundamentals
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
probability-fundamentals
probability
+2
votes
1
answer
Difference between convex and non-convex cost function; what does it mean when a cost function is non-convex?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
data
data-science
probability
data-probability
convex
non-convex
+2
votes
1
answer
You randomly draw a coin from 100 coins — 1 unfair coin (head-head), 99 fair coins (head-tail) and roll it 10 times.
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
data
pobability
data-probability
+2
votes
1
answer
The probability that item an item at location A is 0.6, and 0.8 at location B. What is the probability that item would be found on Amazon website?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
data
probability
amazon
data-probability
+1
vote
1
answer
What is boosting?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
boosting
boosting-algorithm
data-boosting
+2
votes
1
answer
What is overfitting?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
overfitting
data-science
data-overfitting
+2
votes
1
answer
Is it beneficial to perform dimensionality reduction before fitting an SVM? Why or why not?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
svm
data-science
svm-fitting
+1
vote
1
answer
What is a kernel? Explain the kernel trick
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
kernel
kernel-trick
data-kernel
+2
votes
1
answer
What is a random forest? Why is it good?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
random-forest
data-science
data-random-forest
+2
votes
1
answer
What is a decision tree?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
decision-tree
data-science
data-decision-tree
+2
votes
1
answer
How to check if the regression model fits the data well?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
regression-model
data-well
model
data-model
+2
votes
1
answer
What is collinearity and what to do with it? How to remove multicollinearity?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
collinearity
multicollinearity
data-science
+2
votes
1
answer
What are the assumptions required for linear regression? What if some of these assumptions are violated?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
linear-regression
assumptions
data-science
+2
votes
1
answer
Why is mean square error a bad measure of model performance? What would you suggest instead?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
model-performance
data-science
square-error
+2
votes
1
answer
Do you think 50 small decision trees are better than a large one? Why?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
decision-tree
data-science
data-decision-tree
+1
vote
1
answer
What are the drawbacks of a linear model?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
linear-model
linear-model-drawbacks
disadvantages-linear-model
+2
votes
1
answer
Why is Naive Bayes so bad? How would you improve a spam detection algorithm that uses naive Bayes?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
naive-bayes
algorithm
data-science-algorithm
+1
vote
1
answer
What is principal component analysis? Explain the sort of problems you would use PCA for.
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
component-analysis
principal-component
+2
votes
2
answers
Why is dimension reduction important?
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
reduction
dimension-reduction
data-science
+2
votes
1
answer
When would you use random forests Vs SVM and why?
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
random-forest
svm
data-science
+1
vote
1
answer
What does NLP stand for?
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
nlp
data-science
data-nlp
+1
vote
1
answer
Assume you need to generate a predictive model using multiple regression. Explain how you intend to validate this model
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
predictive-model
regression
+1
vote
2
answers
What is the difference between supervised learning and unsupervised learning? Give concrete examples
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
supervised-learning
unsupervised-learning
+3
votes
1
answer
Explain what a false positive and a false negative are. Why is it important these from each other?
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
data-science
false-negative
+1
vote
1
answer
Explain what precision and recall are
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
precision
recall
+1
vote
1
answer
How to define/select metrics?
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
define-metrics
select-metrics
data-metrics
+1
vote
1
answer
What is cross-validation?
asked
May 27, 2021
in
Data Science
by
sharadyadav1986
cross-validation
data-science
data-validation
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