Algebra

There are 40 volunteers for the research study on the Power Pill. Each subgroup of the study will contain 10
participants. Determine how many ways these participants can be selected and explain your method.
Part 2:
There are 15 research doctors participating in the study and the research board needs to be established with
the offices of director, assistant director, quality control analyst, and correspondent. (Doctors can only hold one
office on the research board.) Determine how many ways this research board can be chosen and explain your
process.
Task 2
In Task 1, you selected the participants’ groups and assigned roles for the research board. For Task 2, you will
now analyze the data collected from the groups.
The study participants were divided into four groups—two groups received the Power Pill (Group A and Group
B) and two groups received a placebo (Group C and Group D). The effects of the Power Pill were measured.
One group that received the Power Pill (Group A) and one group that received the placebo (Group C) were told
of the anticipated effects of the Power Pill—accelerated hair growth—while the other two groups (Group B and
Group D) were not provided with this information. All four groups were told to monitor and report any physical
changes during the study.
Results were reported and participants were grouped as to either “Saw Results,” meaning that participants
reported increased hair growth as part of physical changes during the study, or “No Results,” meaning that
increased hair growth was not mentioned as part of physical changes during study.
Results are as follows:
• 6 in Group A saw results.
• 7 in Group B saw results.
• 5 in Group C saw results.
• 4 in Group D saw results.
Part 1:
Create a two-way table for the data and find the probabilities for each group. Describe results in terms of the
study.
Part 2:
What is the probability that a person saw results, given they received the Power Pill? What is the probability
that a person saw results, given they received a placebo? Explain in terms of the study.
Part 3:
What is the probability that a person received the placebo, given that they did not see results? What is the
probability th