1. Floods in Malaysia are regular natural disasters which happen nearly every year especially during the monsoon season. The east coast of peninsular Malaysia is the most prone to flooding especially during the northeast monsoon season from October to March. The most current Malaysian floods happened when several states were flooded in late 2020 and early 2021. Floods caused thousands of people to be evacuated to evacuation centers. The floods also claimed several lives and caused almost all types of land transport in the affected areas to be cut off. You are working with the Department of Irrigation and Drainage Malaysia and given a task to study the THREE state water level (Normal, Warning and Danger) in THREE (3) different rivers. Carry out an appropriate statistical analysis by varying the confidence level and state all assumptions. Explain your findings.

(use the data from http://infobanjir.water.gov.my/real_time.cfm).