Question

I NEED HELP QUICK!!

Answer 1

Answer:

1) Each group is composed of 10 people. They either saw results or don't saw results.

          saw results      no results   Total

A             6                        4              10  

B             7                         3              10  

C             5                         5             10  

D             4                         6              10  

Total      22                        18            40  

Probability of a group seeing results:

Group A: 6/10 = 0.6

Group B: 7/10 = 0.7

Group C: 5/10 = 0.5

Group D: 4/10 = 0.4

Probability of a group not seeing results:

Group A: 4/10 = 0.4

Group B: 3/10 = 0.3

Group C: 5/10 = 0.5

Group D: 6/10 = 0.6

2) Groups A and B  received the Power Pill.

What is the probability that a person saw results, given they received the power pill?

(6+7)/20 = 0.65

Groups C and D  received the placebo.

What is the probability that a person saw results, given they received a placebo?

(5+4)/20 = 0.45

3) What is the probability that a person received the placebo, given they did not see results?

(5+6)/18 = 0.61

What is the probability that a person received the power pill, given that they did not see results?

(3+4)/18 = 0.39