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Mathematics, 24.11.2021 16:00 leigha54

The results of the tests run on the samples are shown in the following table. Firm A 379 376 353 363 359 381 348 372 363

Firm B 364 356 361 360 351 353 354 358 355
362

Does the sample information support the suspicion that the average strength of corrugated fiberboards from Firm A is three pounds per square inch higher than that from Firm B? Test at the 0.05 level of significance.

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