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Chapter 7 - Analysing the Data Part IV - Analysis of Variance Chapter 1 - Behavioural Science and research Chapter 2 - Research Design Chapter 3 - Collecting the Data Chapter 4 - Analysing the Data Part I - Descriptive Statistics Chapter 5 - Analysing the Data Part II - Inferential Statistics Chapter 6 - Analysing the Data Part III - Common Statistical Tests Sources of data Samples and populations Sampling methods Quantitative and qualitative approaches Questionnaire design Coding of data Readings and links


Chapter 3: Collecting the Data


Sample size

Finally you need to consider how many people you need for your survey. The number of people you target depends on the trade off between costs and benefits. You need enough people to answer the questions you are asking in a valid and reliable way, so, in general, the more the merrier. But the more you recruit the more it is going to cost you in terms of money and time. So you need to be able to determine some minimum number. Ray and Howell consider some these issues in more detail.




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