Question

There are ______volunteers for the research study on the gggg. Each subgroup of the study will contain _____participants. Determine how many ways these participants can be selected and explainour method.

Answer 1

nCr=n factorial over r factorial times n minus r factorial<---this is the formula we use

Answer 2

that's only if you had 2 subgroups

Answer 3

but we actually have 40/10 = 4 subgroups

Answer 4

Oh okay:)

Answer 5

wouuld we use permutations?

Answer 6

I'm not sure, but I'm still thinking

Answer 7

kk:)

Answer 8

i can ask another question if u don't know this one:)

Answer 9

yeah I'm stumped, but I'll still give it some thought. What is your other question?

Answer 10

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.

Answer 11

it isnt actually that bad this question

Answer 12

hmm I guess if you group it into 2 groups, then you'd be right in saying you use a combination. Just think of group A and B as one group (same as C and D).

Answer 13

ok. How would the data table look then?

Answer 14

one moment