Lecture 1.3 - Introduction and Types of Data - Classification of data

Question 1

Classification of Data

Answer 1

1. Categorical
2. Numerical

Question 2

Categorical and numerical variables

Answer 2

1. Categorical variable is also called qualitative variable and identifies group membership.
2. Numerical data is also called quantitative variable and describes numerical properties of cases with measurement units.
3. Measurement units are scales that define the meaning of numerical data such as weights in Kg, prices in rupees, heights in centimeters, etc.
4. The data that make up a numerical variable in a data table must share a common unit.

Question 3

Numerical Variable Classification

Answer 3

1. Discrete
2. Continuous

Question 4

Cross-sectional and time-series data

Answer 4

1. Time series data is recorded over time.
2. A time plot is a graph of a time series showing values in chronological order.
3. Cross-sectional data is observed at the same time.