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

What is the middle observation in an arranged set of data called?

Answer :
  • Median

1st quartile is also known as_____.

Answer :
  • lower quartile

What is the square of the standard deviation called?

Answer :
  • variance

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

Answer :
  • 4

3rd quartile is also known as_____.

Answer :
  • upper 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 average of all observations in a set of data known as?

Answer :
  • mean

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

Answer :
  • 4

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

Answer :
  • range

A simple random sample is one in which:

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