I have a questions Id likes some guidance with and the steps I should take in order to correctly answer the question.

1)

a)James was the tutor of tutorial 21. However, he is interested in the outcome of the overall course. To help him out, you use the information for tutorial 21 to calculate two-point estimates of the average grade for the whole course using two different ways. Explain if you expect the two estimates to be the same.

b)Then calculate an interval estimate for the average grade using the information from tutorial 21. If you need any further information besides that given, you are free to select it as you wish as long as you shortly explain your choice. Explain the result and discuss which assumptions you made and how these could be justified.

Pass grade is 50% and total number of students is 520.

189 Students work with a mean grade of 66.58

331 Students do not work with a mean grade of 62.903

Mean of whole data set is 64.24

Std of whole data set is 16.30