# Exercise 6.1: Split-Apply-Combine of the frog data set¶

We will continue working with the frog tongue adhesion data set.

You’ll now practice your split-apply-combine skills. First load in the data set. Then,

**a)** Compute standard deviation of the impact forces for each frog.

**b)** Compute the coefficient of variation of the impact forces *and* adhesive forces for each frog.

**c)** Compute a data frame that has the mean, median, standard deviation, and coefficient of variation of the impact forces and adhesive forces for each frog.

**d)** Now tidy this data frame. It might help to read the documentation about melting.