Question 2

A sample of 146 children were examined for anemia 21 were found to be anemic. can you conclude that 20% of these children were anemic?

Question 7

Before an increase in excise duty on tea, 800 people out of a sample of 1000 were found to be tea drinkers. After an increase in duty, 800 were found to be tea drinkers out of a sample of 1200 people.

Using standard error of proportion, state whether there is a significant decrease in consumption of tea after the increase in excise duty.