A newsletter reported that 90% of adults drink milk. A regional farmers’ organization planning a new marketing campaign across its multicounty area polls a random sample of 750 adults living there. In this sample, 657 people said that they drink milk. Do these responses provide strong evidence that the 90% figure isn’t accurate for this region? Correct the mistakes you find in a student’s following attempt to test an appropriate hypothesis:

There is more than a 97% chance that the stated percentage is correct for this region.

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Họ: p = 0.9 Ha: p < 0.9 SRS, 750 > 10 (0.88)(0.12) 657 0.876; SD6) = = 0.012 750 750 0.876 – 0.94 0.012 P = P(z > -2) = 0.977