The president of Doerman Distributors, Inc., believes that 31% of the firm’s orders come from first-time customers. A random sample of 101 orders will be used to estimate the proportion of first-time customers.
1. What is the probability that the sample proportion will be between 0.21 and 0.41?
7. What is the probability that the sample proportion will be between 0.26 and 0.36?
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