Question

Here is the scenario that I am working on:

The efficacy of a new addiction medication was evaluated in a randomized, placebo-controlled, doubleblind study. The medication in question, Antaquil, is intended to moderate the symptoms of alcohol withdrawal and craving with minimum side effects. Over the course of three weeks, a sample of 36 individuals who were recovering from alcohol addiction were randomly assigned to two groups: one administered the medication and one administered a placebo. At the end of the designated period, participants were administered the Obsessive Compulsive Drinking Scale (OCDS), an instrument that provides a global measure of thoughts about alcohol during nondrinking periods. Scores can range from 0 to 40 with higher scores signaling higher levels of rumination about alcohol. Prior to participation participants were all informed of the nature of Antaquil and were told they could leave the study at any time. Outcome data on the OCDS are shown below (also found in the Data Set Scenario 4 Excel file).

treatment group 40, 35, 27,18,30,28,11,23,30,13,16,17,26,22,19,17,29,10

placebo group 37,35,34,24,29,14,23,25,32,37,30,30,29,22,23,31,28,20

I need to know what the mean and standard deviations are

Answer 1

Obs.	Treatment (x)	x2		Obs.	Placebo (y)	y2
1	40	1600		1	37	1369
2	35	1225		2	35	1225
3	27	729		3	34	1156
4	18	324		4	24	576
5	30	900		5	29	841
6	28	784		6	14	196
7	11	121		7	23	529
8	23	529		8	25	625
9	30	900		9	32	1024
10	13	169		10	37	1369
11	16	256		11	30	900
12	17	289		12	30	900
13	26	676		13	29	841
14	22	484		14	22	484
15	19	361		15	23	529
16	17	289		16	31	961
17	29	841		17	28	784
18	10	100		18	20	400
SUM =	411	10577		SUM =	503	14709