Data Science

Question 1

Quantitative Data

Answer 1

Anything that can be counted or measured; it refers to numerical data

Question 2

Qualitative Data

Answer 2

is descriptive, referring to things that can be observed but not measured—such as colors or emotions

Question 3

Net Promoter Score (or NPS)

Answer 3

is a common metric companies use to track the success of a product or website. It’s measured by asking a simple question

Question 4

EDA

Answer 4

Exploratory Data Analysis

Question 5

Sample Size

Answer 5

Number of Data Points Used

Question 6

Statistical Steps

Answer 6

t-test, Z-test, ANOVA, chi-square

Question 7

What does it mean if an A/B test is not statistically significant?

Answer 7

We can’t conclude which option is better. Difference is likely due to random chance.

Question 8

Machine Learning

Answer 8

Predictions from data

Question 9

Supervised machine learning

Answer 9

Predictions from data with labels and features

Question 10

Decision Tree

Question 11

Logistic

Question 12

Random Forest