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78% of U.S. homes have an over the counter microwave in their homes. In a random...

  1. 78% of U.S. homes have an over the counter microwave in their homes. In a random sample of 250 homes, what is the probability that greater than 50 do not have over the counter microwave?
Math   Statistics-And-Probability   
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Answer #1

Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(-0.6870, TRUE)" to find the probability.
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