A market research firm is hired to estimate the percent of adults living in a large city who have cell phones. The firm randomly selects 480 adult residents to determine whether they have cell phones. Of the 450 people sampled, 387 own cell phones. Compute a 99% confidence interval for the true proportion of adult residents of this city who have cell phones. Round the answer to three decimal places.

A market research firm is hired to estimate the percent of adults living in a large city who have cell phones. The firm randomly selects 480 adult residents to determine whether they have cell phones. Of the 450 people sampled, 387 own cell phones. Compute a 99% confidence interval for the true proportion of adult residents of this city who have cell phones. Round the answer to three decimal places.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 30PPS

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