Use Stata, SPSS, or Excel for the questionnaire in Fig. 2.1, and enter the data from Fig. 3.1. Allow for missing values in the dataset.

Figure 2.1

Figure 3.1

Gender: male female Age: Body weight: Which spread do you prefer? (Choose one answer) butter margarine 001) poor kg On a scale of 1 (poor) to 5 (excellent) how do rate the selection of your preferred spread at our store? 0(2) fair other average (4) good 0(5) excellent