Rodrigo sits at a street corner and records the number of red sports cars that are and are not speeding. What kind of study is this?

A. Double-blind study
B. Experiment
C. Sample survey
D. Observational study

Question

Rodrigo sits at a street corner and records the number of red sports cars that are and are not speeding. What kind of study is this?

 		A.	Double-blind study
 		B.	Experiment
 		C.	Sample survey
 		D.	Observational study

nnesha · Answer

what do you think ?? guess maybe ??

snowflakelove15 · Answer

I think it's D and observational study

nnesha · Answer

just sits at a corner and recording data

nnesha · Answer

yes that's correct 
sample and experiment study involvez participation of other people

nnesha · Answer

yes
and double- blind study is where they don't know who is in control and experiment group

snowflakelove15 · Answer

Thank you!

nnesha · Answer

yw