A manufacture of Sedap yogurts wanted to investigate the claim made by the consumer regarding the different in weight between the strawberry and Blueberry flavors yogurts. A sample of 9 strawberry flavor and 13 of blueberry flavor yogurts are collected and their weight are recorded as in the table. The weight in grams of a Low fat Strawberry and a Low Fat Blueberry are as follows. Is there any difference between the mean of the weight. Use a=0.05 and assume the variances are equal.
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