A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours. Describe an investigation that could be used to determine if this claim is valid. In your answer, include at least a description of: the treatment to be given to the experimental group, the treatment to be given to the control group, the data to be collected, when the data should be collected, and one observation that would lead to the conclusion that the claim is valid.?

$