In a survey of 1825 randomly-selected adult Australian internet users, 1523 said that they obtain health information on the internet.

a)Use these data to evaluate the evidence that at least four-fifths of adult Australian internet users get health information from the internet. Assume = 1%, use a P-value approach, and include all relevant steps of a formal hypothesis test.

b)Can the conclusion from part (a) be generalised to the Australian adult population? Explain why or why not.