An experiment was conducted to compare the filling capability of packaging equipment at two different wineries. Ten bottles of pinot noir from Ridgecrest Vineyards were randomly selected and measured, along with 10 bottles of pinot noir from Valley View Vineyards. The data are as follows (fill volume is in milliliters):

(a) What assumptions are necessary to perform a hypothesis testing procedure for equality of means of these data? Check these assumptions.
(b) Perform the appropriate hypothesis-testing procedure to determine whether the data support the claim that both wineries will fill bottles to the same mean volume.

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Valley View 756 754 Ridgecrest 755 751 752 753 754 753 753 756 757 756 756 755 753 755 752 755 756 751