An experimenter obtained 84 samples of concrete. When the samples were each subjected to a load of
Question:
An experimenter obtained 84 samples of concrete. When the samples were each subjected to a load of size 115, a total of 17 of the samples broke while the other samples were unharmed. The remaining 67 samples were then subjected to a load of size 120, and 32 of them broke. Finally, the remaining 35 samples were subjected to a load of size 125, and 21 of them broke. This left 14 samples that survived the highest load. It is claimed that the breaking load of samples of this type of concrete is normally distributed with a mean 120 and a standard deviation 4. Are the results of this experiment consistent with that claim?
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PN120 4 2 115 PN0 1 1151204 125 01056 PN120 4 2 120 PN0 1 120120...View the full answer
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