# Question: The president of Doerman Distributors Inc believes that 30 of

The president of Doerman Distributors, Inc., believes that 30% of the firm's orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time customers.

a. Assume that the president is correct and p = .30. What is the sampling distribution of for this study?

b. What is the probability that the sample proportion will be between .20 and .40?

c. What is the probability that the sample proportion will be between .25 and .35?

a. Assume that the president is correct and p = .30. What is the sampling distribution of for this study?

b. What is the probability that the sample proportion will be between .20 and .40?

c. What is the probability that the sample proportion will be between .25 and .35?

## Answer to relevant Questions

The Cincinnati Enquirer reported that, in the United States, 66% of adults and 87% of youths ages 12 to 17 use the Internet (The Cincinnati Enquirer, February 7, 2006). Use the reported numbers as the population proportions ...About 28% of private companies are owned by women (The Cincinnati Enquirer, January 26, 2006). Answer the following questions based on a sample of 240 private companies. a. Show the sampling distribution of p-bar, the sample ...Refer to the Scheer Industries example in Section 8.2. Use 6.84 days as a planning value for the population standard deviation. a. Assuming 95% confidence, what sample size would be required to obtain a margin of error of ...America's young people are heavy Internet users; 87% of Americans ages 12 to 17 are Internet users (The Cincinnati Enquirer, February 7, 2006). MySpace was voted the most popular website by 9% in a sample survey of Internet ...Nielsen Media Research conducted a study of household television viewing times during the 8 p.m. to 11 p.m. time period. The data contained in the file named Nielsen are consistent with the findings reported (The World ...Post your question