Overview
Show your work. Only the final answer to each problem is not acceptable. Problems
that are not “SAS problems” are to be calculated by hand, showing your work, unless otherwise
indicated. To facilitate repetitive calculations, these may be organized and performed in Excel,
provided you print these out and turn them in to show intermediate calculations.
The assignment is due at November 16 11:59pm EST
Problems from Chapter 12:
1. Problem 1
2. SAS Problem 1. However, ignore the instructions following the data (the book has an
error: the instructions for SAS problems 1 and 2 reversed) and instead use the following
instructions:
Use SAS to perform a Wilcoxon Rank Sum test. Perform the test at a 5% level of
significance.
Problems from Chapter 10:
1. Problem 1, part (c) only
Note: parts (a) and (b) were done on an earlier assignment. From part (a), we know
that r = 0.911. You may take this value of r as given for part (c) (i.e., you do not
need to recalculate it).
2. Problem 4
3. SAS Problem 2
MPH0300 – Introduction to Biostatistics
Homework 9Intro to Biostatistics: Homework #9 Cover Page
Instructions: Place final answers on this cover page. All work should be attached behind the cover page. Showing no
work will result in no points.
Chapter 12:
#1) Hypotheses (2):
Rank sum statistic S = _______
Test statistic (normal approximation) Z = ______
Decision rule: ________________________
Test result: ______________
Conclusion:
SAS #1) Hypotheses (2):
Rank sum statistic S = _______
Test statistic (normal approximation) Z = ______
Decision rule: ________________________
Test result: ______________
Conclusion:
Chapter 10:
#1) c) Equation of the best-fitting line:
#4) a) Yes/No: ______
Brief explanation:
b) Equation of the best-fitting line:
c) Expected severity score | (Age=60) = _______
SAS #2) (Attach scatter plot)
(Pearson) correlation coefficient: _____
Hypotheses (2):
Test statistic value: (not given by SAS – can omit or calculate manually) _______
Decision rule:
________________________
Test result: ______________
Conclusion:
Equation of the best-fitting line:
R2 = ________
Expected output for this assignment should be about ~4 pages or less.