Applying the Concepts-Basic7.59 Paying for music downloads. If you use the Internet, haveyou ever paid to access or download music? This was oneof the questions of interest in a recent Pew Internet andAmerican Life Project Survey (Oct. 2010). Telephone in-terviews were conducted on a representative sample of1,003 adults living in the United States. For this sample,506 adults stated that they have paid to download music.a. Use the survey information to find a point estimatefor the true proportion of U.S. adults who have paid todownload music.NWb. Find an interval estimate for the proportion, part a. Usea 90% confidence interval.c. Give a practical interpretation of the interval, part b. Youranswer should begin with "We are 90% confident ..."d. Explain the meaning of the phrase "90% confident."7.60 Interactions in a children's museum. Refer to the EarlyChildhood Education Journal (Mar. 2014) study ofinteractions in a children's museum, Exercise 2.19 (p. 41).(Interactions by visitors to the museum included show-and-tell, learning, teaching, refocusing, participatory play,advocating, and disciplining interactions.) Recall that theresearchers observed a sample of 170 meaningful interac-tions, of which 81 were led by children and 89 were led byadult caregivers.a. Give a point estimate of the true proportion of allmeaningful interactions in a children's museum that areled by children.b. Form a 90% confidence interval around the proportion,part a.c. Interpret the interval, part b, in the words of the studyd. Suppose an educator claime th

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Description: Applying the Concepts-Basic7.59 Paying for music downloads. If you use the Internet, haveyou ever paid to access or download music? This was oneof the questions of interest in a recent Pew Internet andAmerican Life Project Survey (Oct. 2010). Teleph

n = 1003 z-critical value at alpha = 0.1 is 1.645

Math

Statistics

a. Use the survey information to find a point estimate for the true proportion of U.S. adults who have paid to download music. b. Find an interval estimate for the proportion, part a. Use a 90% confidence interval. C. Give a practical interpretation of the interval, part b. Your answer should begin with "We are 90% confident..." d. Explain the meaning of the phrase "90% confident."

a. Use the survey information to find a point estimate for the true proportion of U.S. adults who have paid to download music. b. Find an interval estimate for the proportion, part a. Use a 90% confidence interval. C. Give a practical interpretation of the interval, part b. Your answer should begin with "We are 90% confident..." d. Explain the meaning of the phrase "90% confident."

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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