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
Update index.Rmd

typo
Merge pull request #20 from rthisted/master

Typos and clarifications in HW3 and HW4
Added use arrow keys to the title slides
Added hw3.html
Reworded hw4
Fix typo
slide 17 typo: red line
slide 17 typo: red line
typos: calculus, form -> from
typos: calculus, form -> from
typos: calculus, form -> from
slide 17 typo: red line
Fixed LATEX/ R typo from Regression Models 01_03

LATEX:
\sum_{i=1^n} => \sum_{i=1}^n
\beta_1 => \hat \beta_1

R Code:
Fixed missing `/`