What is the sample size (n=) and what consequences will the sample size have on my analysis and reporting of results?
What is the sample size (n=) and what consequences will the sample size have on my analysis and reporting of results?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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What is the sample size (n=) and what consequences will the sample size have on my analysis and reporting of results?
Transcribed Image Text:Scenario 4 (Addictions)
bli eicacy of a new addiction medication was evaluated in a randomized, placebo-controlled, double-
olind 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
maividuals 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
O 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 Gp
Placebo Gp
40
37
35
35
27
34
18
24
30
29
28
14
11
23
23
25
30
32
13
37
16
30
17
30
26
29
22
22
19
23
17
31
29
28
10
20
Expert Solution
Step 1
Sample size:
A sample size is a subset of the desired population. It is a part of the population. It is defined as the number of observations used for determining the estimations of a given population. Sampling is the process of selection of a subset of individuals from the population to estimate the characteristics of the whole population.
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