Week 6

What is the first thing to do when you are given a set of data?

• Plot the histogram

• Check if there are enough data

• Check for any missing values

• Ask my teacher questions

What is a missing value?

• Value that was entered as "No"

• No value in a cell of a data table

• A data that was not numerical

• A value that was entered wronglyclaclarcaclas

Missing values can be resolved by removing the rows that contain missing values.

• True

• False

Data was collected for 100 days, and the temperature readings for 20 days were not captured. What should we do?

• Remove the 20 rows that have no temperature readings

• Remove the column with header "Temperature"

• Replace the 20 days with the average temperature

• Cannot continue

What is the impact if we remove a column from the data?

• Lost integrity

• One variable less to analyse

• Simplify the problem

• Lose an observation

Name the process to prepare the data so that there are no missing values.

• Data Sweeping

• Data Analysis

• Data Cleaning

• Data Washing