You should do this homework on your own -- one submission per student, and by submitting you are certifying the homework is your work.
Submission: Homework 7 submission will be via Compass (you should have been signed up automatically, if not please email Rick) Submit your answers, graphs, and other responses as a PDF
For problem 8.7b you should estimate the standard error by estimating the popsd. Estimate the popsd by calculating the standard deviation fo the dataset