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You may need to use the appropriate appendix table or technology to answer this question The president of Doerman Distributors Inc believes that 30 of the firm s orders come from first time customers A random sample of 150 orders will be used to estimate the proportion of first customers a Assume that the president is correct and p 0 30 What is the sampling distribution of p for n 150 Round your answer for o to four decimal places p E p Since np and n 1 p approximating the sampling distribution with a normal distribution Select appropriate in this case b What is the probability that the sample proportion p will be between 0 20 and 0 40 Round your answer to four decimal places c What is the probability that the sample proportion will be between 0 25 and 0 35 Round your answer to four decimal places
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