Question: An airline has surveyed a simple random sample of air
An airline has surveyed a simple random sample of air travelers to find out whether they would be interested in paying a higher fare in order to have access to e-mail during their flight. Of the 400 travelers surveyed, 80 said e-mail access would be worth a slight extra cost. Construct a 95% confidence interval for the population proportion of air travelers who are in favor of the airline’s e-mail idea.
Answer to relevant QuestionsIn response to media inquiries and concerns expressed by groups opposed to violence, the president of a university with over 25,000 students has agreed to survey a simple random sample of her students to find out whether the ...In a major industry where well over 100,000 manufacturing employees are represented by a single union, a simple random sampling of n = 100 union members finds that 57% of those in the sample intend to vote for the new labor ...An investment counselor has purchased a large mailing list consisting of 50,000 potential investors. Before creating a brochure to send to members of the list, the counselor mails a questionnaire to a small simple random ...In Exercise 9.65, suppose that (unknown to the dealers) the actual population proportion is really 0.35. If they use their estimated value (π ≤ 0.15) in determining the sample size and then conduct the study, will their ...A transportation company operates 200 trucks and would like to use a hidden speed monitor device to record the maximum speed at which a truck is operated during the period that the device is installed. The trucks are driven ...
Post your question