The article “Effect of Internal Gas Pressure on the Compression Strength of Beverage Cans and Plastic Bottles”

(J. Testing and Evaluation, 1993: 129–131) includes the accompanying data on compression strength (lb) for a sample of 12-oz aluminum cans filled with strawberry drink and another sample filled with cola. Does the data suggest that the extra carbonation of cola results in a higher average compression strength? Base your answer on a P-value.

What assumptions are necessary for your analysis?

Sample Sample Sample Beverage Size Mean SD Strawberry drink 15 540 21 Cola 15 554 15