with the recent interest in the proportion of Australians who use recreational drugs, suppose a survey is conducted on 10,000 randomly chosen Australians aged 15 years or older. It is found that 1,600 of the participants in the survey currently use recreational drugs. Obtain a 95% confidence interval for the proportion of all Australians aged 15 years and older who currently use recreational drugs. State the formula, show all working and remember to always interpret your interval in the context of the