In Problem 2 as originally worded, "data" don't have standard errors; parameter estimates do.  The intent was that the value 1 is the SD of the 9 differences, not the standard error of their mean.  The original wording was ambiguous.
Problem 3 improve wording for non-English speakers
The BMI comparison problem doesn't provide a place to submit the answer!  (Also,it appears as if the both the diet and placebo INCREASE bmi, but that is another problem.
The BMI comparison problem doesn't provide a place to submit the answer! (Also,it appears as if the both the diet and placebo INCREASE bmi, but that is another problem.
Unnecessary intermediate html version deleted
Fix placement of instructions on question
correct typos
Merge pull request #20 from rthisted/master

Typos and clarifications in HW3 and HW4