Comparing major protrusions

Goal: Compare the average volume of the major protrusion for untreated cells and CK666 treated cells. 

Got all the major protrusion volumes
untreated.largest.prot = c(c14_protrusions_rv2$V3, c15_protrusions_rv$V3, c10_protrusions_rv2$V3, c12_protrusions_rv$V3)

Found the mean and the standard dev
mean(untreated.largest.prot)
sd(untreated.largest.prot)

Note: for setting all NAs to 0:
x[is.na(x)] <- 0

Results:
The average volume of the major protrusion is higher, but also has a very large standard deviation.