The Unit convenor of this unit on UTS, wanted to investigate the proportion of students who regularly watch the Lecture videos before coming to the tutorial.

She samples 30 students and found that 20 of them watch the video regularly before coming to the tutorial

Calculate a 95% confidence interval to find the true proportion of all students who regularly watch the Lecture videos before coming to the tutorial.

a)What formula would you use to answer this question? Use "snipping tool" to copy and paste your formula

b)What is the sample proportion p? Give this value in fraction

c)What is the critical value you would use? Use the corresponding table and provide the value

Hint: To answer this question, you should type the area you will use.Match this area with the corresponding z and type the corresponding z value as shown in Tutorial.