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 = 39 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  ---Select--- is is not possible to use the normal approximation to the binomial distribution because n · p =  , which is  ? > ≤ 5, and n · q =  , which is  ? > ≤ 5. (b) Find the values of μp̂ and σp̂. (Round your answer for σp̂ to three decimal places.) μp̂ =   σp̂ =

Which of the following statements is not true?     There is only one median for each variable.     One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude.     Another term for the median is 50th percentile.     The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.

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 =

In the population you are studying (people who live alone), there are 40% of men and 60% of women. If you know that the mean number of take-out dinners in a month for men is 15.1, and that the overall mean number of take-out dinners per month (for the population) is 13.4, then what is the mean number of take-out dinners in a month for women? Enter your answer rounded to one decimal place.

On a scale of 0 to 10, the student rated her enjoyment of stats as an 8. The average rating among students is 5, and the average spread around that mean is 1.5.  I got the z score as 2.0. Can you kindly help with these questions below?   What percent of college students enjoy statistics more? What percent of college students enjoy statistics less?

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For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 982 supermarket shoppers revealed that 262 always stock up on an item when they find that item at a real bargain price. (a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit       upper limit

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 986 supermarket shoppers revealed that 268 always stock up on an item when they find that item at a real bargain price.   (a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit       upper limit         What is the margin of error based on a 95% confidence interval? (Round your answer to three decimal places.)