Statistics Solutions

(Step-by-Step) According to the Internal Revenue Service, 75% of all tax returns leads to a refund. A random sample of 100 tax returns is taken… What is

Question: According to the Internal Revenue Service, 75% of all tax returns leads to a refund. A random sample of 100 tax returns is taken…

  1. What is the mean of the sample proportion of returns leading to refunds?
  2. What is the standard error of the sample proportion?
  3. What is the probability that the sample proportion exceeds 0.8?

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