Given the table above;
a) Determine a 95% confidence interval for the percentage of people using alternative operating systems in each country
b) It has been claimed that the proportion of Windows users differ between Australian and American. Let the proportion of Americans vs Australians who use Windows OS to be p1 and p2 respectively. What are the null and alternative hypotheses for testing the claim described.
I know I have to find standard deviation and mean for each question but i'm not sure how to do that? This isnt a regular frequency table so I'm not too sure where to start. Any help is appreciated.
TIA