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Un-Answered Questions { Data Science }

What is the difference between supervised and unsupervised methods?

323


What is a z test, chi square test, f test and t test?

314


What packages are used for data mining in python and r?

304


What are the various classification algorithms?

305


What is data science? Also, list the differences between supervised and unsupervised learning.

277


A certain couple tells you that they have two children, at least one of which is a girl. What is the probability that they have two girls?

378


List the differences between supervised and unsupervised learning.

314


How does data cleaning plays a vital role in analysis?

354


What is back propagation and explain it’s working.

295


What is the role of activation function?

446


Explain the structure of artificial neural networks?

369


Explain the difference between a validation set and a test set?

275


In any 15-minute interval, there is a 20% probability that you will see at least one shooting star. What is the proba­bility that you see at least one shooting star in the period of an hour?

432


How can you generate a random number between 1 – 7 with only a die?

541


What is the difference between “long” and “wide” format data?

288