mean(c(18.9,14.2,15.7,24.8,27.4,16.2,34.4,30.8,25.6,21.0,16.8,9.7))

What value does R give for the mean of these 12 numbers?

Use your keyboard up-arrow in the console and change mean to sd in your Question 2 code. What value do you get for the standard deviation of these 12 numbers?

Log(639)

What is the first word R gives you when you evaluate this?

Use help(log) or ?log to get information about the log function in R.

Using this function, the value of log2(988) is