A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours. Describe an investigation that could be determine if this claim is vaild.
IN your answer include this>
- the treatment give to the expertimental group
- treatment to be give to the control group
- data collected
-when
How do i do this question
2 answers
nothing
this is sooooo unhelpful. the least you could do is actually give an answer.