In a comparison between the mean waiting times of the customers in two different branches for Fast – Food the manager selected 60 customers from first branch and their mean waiting time was 30 minutes...

In a comparison between the mean waiting times of the customers in two different branches for Fast – Food the manager selected 60 customers from first branch and their mean waiting time was 30 minutes and the previous reports showed that the variance was 16 minutes. Also a sample consist of 50 customers from second branch was selected and their mean waiting time of this sample was 15 minutes and from previous reports the variance was 25 minutes. Compute 90% confidence interval for the difference between the two means.

What is the tabulated value

What is the S.E value

What Is the lower and upper bound