2.2 Read the brief report of some statistical research below, and a) explain why it is an experiment rather than an observational study
Antibiotics are commonly using to treat sinus infections. Alternatively a sterold solution
can be sprayed into the nose.
In a trial, 240 patients with a sinus infection were assigned to the treatments as follows:

The severity and length of the sinus infection was recorded for all patients.
Identify:
b) the factor(s) in the experiment and the number of levels for each
c) the number of treatments
d) the response variable(s) measured
e) whether it was blind, or double-blind
f) the nature and scope of the conclusion the experiment can reach

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

The answer is c