10.36 An Archeological Find An article in Archaeometry involved an analysis of 26 samples of Romano-British pottery, found at four different kiln sites in the United Kingdom. 13 The samples were analyzed to determine their chemical- composition and the percentage of aluminum oxide in each of 10 samples at two sites is shown below.

Does the data provide sufficient information to indicate that there is a difference in the average percentage of aluminum oxide at the two sites? Test at the 5% level of significance.

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