Probability, Statistics & Math

Question 2

State Bayes’ theorem.

Answer 2

P(A|B) = P(B|A)P(A)/P(B).

Question 3

What is a normal distribution?

Answer 3

A symmetric, bell-shaped distribution defined by mean and variance.

Question 4

What is a Bernoulli distribution?

Answer 4

Models outcomes of a single binary trial with probability p.

Question 5

What is a Poisson distribution?

Answer 5

Models count of events in a fixed interval given a known rate.

Question 6

What is p-value in hypothesis testing?

Answer 6

Probability of observing results as extreme as the data if null hypothesis is true.

Question 7

What is Type I error?

Answer 7

Rejecting a true null hypothesis (false positive).

Question 8

What is Type II error?

Answer 8

Failing to reject a false null hypothesis (false negative).

Question 9

What is MLE?

Answer 9

Method of estimating parameters by maximizing likelihood of observed data.

Question 10

What is eigenvalue?

Answer 10

Scalar indicating how much a linear transformation stretches vectors in a direction. Av=ev

Question 11

What is matrix multiplication?

Answer 11

Combining two matrices to produce a new matrix via dot products of rows and columns.