Population Sample Determination Sample Method

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CHAPTER III RESEARCH METHODOLOGY

A. Scope of Research

In writing this essay were made respondents in the study is the consumers who shopped at Carrefour Lebak Bulus. Research conducted at Carrefour Lebak Bulus, when the study began on August 23, 2016. By providing a questionnaire to the customer Carrefour. As will be discussed is about how much the Service Quality, Sales Promotion and Customer Satisfaction infuencing Customer Loyalty on Carrefour Lebak Bulus . As the independent variable in this study was given the symbol of Service Quality X1, Sales Promotion X2 and Customer Satisfaction X3. While the dependent variable in this study was Customer Loyalty given the symbol Y.

B. Determination Sample Method

1. Population

Population is the generalization region consisting of the objects or subjects that have certain qualities and characteristics defined by the researchers to learn and then be inferred Sugiono, 2013:115. The population in this study is member or non-member customer carrefour Lebak Bulus. 38

2. Sample

The sample is part of the number and characteristics possessed by the population, to be investigated and considered to be representative of the overall population and a smaller number of populations Sugiyono, 2013:116. The sample in this study was the visitors who shop at Carrefour Lebak Bulus. In this study writing, researchers used a method of Purposive sampling. Purposive sampling is which the population elements are purposively selected based on the judgment of the researcher. The researcher, exercising judgment or expertise, chooses the elements to be included in the sample, because researcher believe that they are representative of interest or are otherwise appropriate Malhotra 2009: 377. Due to the number of population is not known for sure to know the size of the sample that is using a convenience sampling technique. Based on this, researchers select to filter the existing questionnaires, if these people are known. For example, used the sample to estimate the mean value, If used to estimate μ, we can 1- α confident that the error does not exceed a certain value е when the sample size of n, Where: Riduwan and Kuncoro, 2013:255 39 Information: = Number of samples Zα = Size trust level with α = 0,05 confidence level 95 means Found in table 1,96 = Standard deviation = Standart error that can be tolerated 5 = 0,05 By calculation: n = From the calculation results, the samples obtained in the amount of 96.04 to make it easier then rounded to 100 respondents. So in this study will use the 100 respondents to the research sample.

C. Data Collection Technique