这道题的CDE三问应该怎么解呢
A non-parametric analysis ofreal data.
This question examines thebacteria levels from an animal experiment where each rat was given flesh woundsin two locations. One location was randomly select for a topical treatment andthe other was left as a control. The bacteria level at each wound was measureda few days later to see if the treatment had an effect on the bacteria level.
a) Read the data bacteria.csvfile into R.
b) Create a vectornamed diff that is the treated bacteria level minus the control bacterialevel.
c) Check to see if diffmasked any objects.
d) If so what type of object was it?
e) What package did it belong to?
| 
发表于 2016-3-18 21:09:41