According to a survey, 50% of Americans were in 2005 satisfied with their job. Assume that...

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According to a survey, 50% of Americans were in 2005 satisfied with their job. Assume that the result is true for the current proportion of Americans. A. Find the mean and standard deviation of the proportion for a sample of 1000. B. Describe the shape of its sampling distribution. C. What is the probability that more than 70% of the Americans were satisfied with their job? According to a survey, 50% of Americans were in 2005 satisfied with their job. Assume that the result is true for the current proportion of Americans. A. Find the mean and standard deviation of the proportion for a sample of 1000. B. Describe the shape of its sampling distribution. C. What is the probability that more than 70% of the Americans were satisfied with their job?

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