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About 68 % of the residents in a town say that they are making an effort...

About 68 % of the residents in a town say that they are making an effort to conserve water or electricity. 140 residents are randomly selected.

1. What are the mean and standard deviation of the proportion of sampled residents who are making an effort to conserve water or electricity?

Mean:

Standard Deviation:

2. What is the probability that the proportion of sampled residents who are making an effort to conserve water or electricity is greater than 80%?

Math   Statistics-And-Probability   
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