Do you have a great deal of confidence in the advice given to you by your medical doctor? About 45% of all adult Americans claim they do have a great deal of confidence in their M.D.s.  Suppose a random sample of n = 31 adults in a health insurance program are asked about their confidence in the medical advice their doctors give. (a) Is the normal approximation to the proportion p̂ = r/n valid? (Round your answers to two decimal places.) It (is or is not) possible to use the normal approximation to the binomial distribution because n · p = (answer),  which is (< or >) 5, and n · q =, which is (> or <) 5.   (b) Find the values of μp̂ and σp̂.  (Round your answer for σp̂ to three decimal places.) μp̂ = σp̂ =

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