Question: In an experiment to determine the effect of curing time on the compressive strength of concrete blocks, two samples of 15 blocks each were prepared

In an experiment to determine the effect of curing time on the compressive strength of concrete blocks, two samples of 15 blocks each were prepared identically except for curing time. The blocks in one sample were cured for 2 days, while the blocks in the other were cured for 6 days. The compressive strengths of the blocks, in tons per square inch, are presented below. 90 84 87 Cured 2 Days 87 75 79 95 88 82

Can you conclude that the median strength differs between the two curing times? Use the α = 0.05 level of significance.

90 84 87 Cured 2 Days 87 75 79 95 88 82 85 96 70 86 70 80 77 Cured 6 Days 94 73 91 97 98 92 82 84 76 88 79 97 90 81 91

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