A study conducted by a research group in a recent year reported that 57% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 14 cell phone owners is studied. Round the answers to at least four decimal places. a. What is the probability that seven or more of them used their phones for guidance on purchasing decisions? b. What is the probability that fewer than eight of them used their phones for guidance on purchasing decisions? c. What is the probability that exactly nine of them used their phones for guidance on purchasing decisions?

A study conducted by a research group in a recent year reported that 57% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 14 cell phone owners is studied. Round the answers to at least four decimal places. a. What is the probability that seven or more of them used their phones for guidance on purchasing decisions? b. What is the probability that fewer than eight of them used their phones for guidance on purchasing decisions? c. What is the probability that exactly nine of them used their phones for guidance on purchasing decisions?

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....

See similar textbooks