Python or R is better for data science?

398

What is term Pearson’s Correlation Coefficient?

370

How and by what methods data visualizations can be effectively used?

344

what is bias?

357

Can you explain recommender system?

336

What is advantage of using apply family of functions in r?

353

A disc is spinning on a spindle and you don't know the direction in which way the disc is spinning. You are provided with a set of pins.How will you use the pins to describe in which way the disc is spinning?

443

What is systematic sampling?

329

You can roll a dice three times. You will be given $X where X is the highest roll you get. You can choose to stop rolling at any time (example, if you roll a 6 on the first roll, you can stop). What is your expected pay-out?

339

How make you 3d plots/visualizations using numpy/scipy?

403

How many people are using Facebook in California at 1.30 PM on Monday?

427

Write a function to check whether a particular word is a palindrome or not.

327

Name three types of biases that can occur during sampling?

331

What is meant by R statistics?

333

Have you used sampling? What are the various types of sampling have you worked with?

322