Annex B - Research Data

Experiment and average results
Raw data is shown in Table 1. The 1st try, 2nd try, and 3rd are the number of drops dropped before white precipitate is shown. Average number refers to the average of drops of the three data collected from each tea sample. The data is then presented as bar charts in Fig. 3.

Table 1. Measuring number of drops of tannic acid solution into each tea


Type of tea     1st Try            2nd Try               3rd Try            Average number of drops


Yellow Label            1                          1                         2                         1.34
Tea

Green Tea                6                          5                         6                         5.67

Blueberry Black        4                          3                         3                         3.34
Tea

Jasmine Tea            14                        11                      17                       14.00

Earl Grey Tea           2                          2                        2                         2.00

Ti-Kuan Yin Tea      10                         7                        11                       9.34

Lemon and               5                          8                         4                        5.67     
Lime Twist
Green Tea


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Fig. 3 Summary of Results

Summary of Results

From the graph, Yellow Label Tea has the most amount of caffeine while Jasmine Tea has the least amount of caffeine as Yellow Label Tea has the least amount of tannic acid added while Jasmine Tea has the most amount of tannic acid added before white precipitate is formed.


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