There was a signal study conducted in the Jubail area for 30 minutes & following observations were recorded. Construct 90 % confidence level for the proportion of drivers that pass the green signal. Also calculate the minimum sample size required for this survey. Take permitted error in the proportion estimate to be 10 %. (3.5 Marks) STRAIGHT RIGHT GREEN 100 YELLOW 3 RED There was a signal study conducted in the Jubail area for 30 minutes & following observations were recorded. Construct 90 % confidence level for the proportion of drivers that pass the green signal. Also calculate the minimum sample size required for this survey. Take permitted error in the proportion estimate to be 10 %. (3.5 Marks) STRAIGHT RIGHT GREEN 100 YELLOW 3 RED