Sample Size Determination for the Study on Marital Adjustment
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Sample Size Determination for the Study on Marital Adjustment

Subject Area: Education / Adult Learning / Instructional Design

Modified: 28 July 2025

In this study, the sample size was determined based on standard statistical techniques used for estimating proportions in survey research. The objective of the study is to evaluate the influence of personality and marital quality on marital adjustment, and the role of counselling intervention. To determine an appropriate sample size for ensuring reliable results, the following formula was used:

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Calculation

Z=1.96 (95% Confidence interval) 

M.E (Margin of error) =5% =0.05 

=80%=0.8 (Response rate (200/250)*100) 

= (1-0.8) =0.2 

n= 

n==0.614656/0.0025=245.86=246 

The sample size taken for the study is n=200 rounded off approximately 

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Conclusion:

The study a final sample of 200 respondents, which rounded from the adjusted estimate. This ensures that the results will have a 95% confidence level and a margin of error of 5%, while accounting for a potential 20% non-response rate. This sample size is deemed appropriate for evaluating the impact of personality and marital quality on marital adjustment, as well as the effectiveness of counselling interventions.

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