Data Science and Machine Learning: Mathematical and Statistical Methods Quiz Questions and Answers

1st quartile is also known as_____.

Answer :
  • lower quartile

The monthly income of 5 persons is 3000, 5000, 4000, 2000 and 6000. What should their arithmetic mean be?

Answer :
  • 4000

What is the mode in the set 2, 4, 5, 4, 6, 5, 3, 4, 2?

Answer :
  • 4

What would the median in the set 6, 4, 2, 3, 4, 5, 5, 4 be?

Answer :
  • 4

A simple random sample is one in which:

Answer :
  • Every unit of the population has an equal chance of being selected

What is the difference between the largest value and the smallest value called?

Answer :
  • range

You create a binary classification model. You need to evaluate the model performance. Which metrics will you use?

Answer :
  • precision, accuracy

You want to build a model that groups users basis similarity. What type of model you want to create?

Answer :
  • Clustering

Which type of bias takes away from the “randomness” you are hoping to achieve?

Answer :
  • Selection Bias

Interqurtile range is

Answer :
  • Q3-Q1