Y/B/16. An analysis of quantitative data will have a focus which is one of 3 possible types: Descriptive; Estimation; Hypothesis testing. Use a survey of supermarket customers to illustrate the difference between each of these phases. Provide examples of the nature of analysis that could be carried out in each phase and describe the techniques that would be appropriate. There are many formal statistical testing procedures available for making comparisons. Discuss the factors that would lead you to choose one test in favour of another.

This paper consists of the following sections: Descriptive Analysis, "True" Mean and Confidence Interval, Shape of the Distribution, Normality, Statistical Estimation, Correlations, Purpose and What is Correlation? Simple Linear Correlation (Pearson r), How to Interpret the Values of Correlations, Significance of Correlations, Sampling, Statistical Hypothesis Tests, Hypothesis Test, Null Hypothesis, Alternative Hypothesis, Significance Level, P-Value, Power, What Statistical Test is Appropriate?