One thing I forgot today was what t.test actually means. Also, I definitely forgot all of the other commands I will need to use (i.e. qt, qnorm, pt, etc). I relearned what the output of t.test gives you first the test stat(Not the t-value), the degrees of freedom, the p-value, what your alternative is, your confidence interval(the default is 95%). I also relearned that the default for t.test is a two-sided interval. Then it displays your confidence interval, and gives you the sample mean. Since I last did most of this about a month ago, I still remembered most of it, but it is always nice to review.