In a random sample of 100 male students, 80 reported that they were in favour of writing announced tests, while in a sample of 50 female students 23 favoured writing announced tests. Let the male students be population 1 and the female studens population 2.
- Determine the point estimate of the difference between the proportions of the two populations
- Calculate the standard error of the difference between the two proportions. Report to 2 decimals correctly.
- Give the lower critical value for a 90% confidence interval for the difference between the proportions of the two populations
- What is the margin of error of a 90% confidence interval for the difference between the proportions of the two populations? Report to 2 decimals correctly