Chapter 11 Homework MATH1123 section OB Fall 2023 WebAssign

Last updated: 12/4/2023

Chapter 11 Homework MATH1123 section OB Fall 2023 WebAssign Suppose that in studies of mobile phone use while driving conducted in 2015 and 2020 3 2 of the drivers observed in 2015 and 2 6 of the drivers observed in 2020 were using a handheld mobile phone while driving Suppose that these percentages were based on observations from independent random samples of 1 500 drivers in 2015 and 1 500 drivers in 2020 a Are the sample sizes large enough to use the large sample confidence interval for a difference in population proportions Yes O No USE SALT b Assume that it is reasonable to regard these samples as representative of drivers in 2015 and drivers in 2020 Estimate the difference in the proportion of drivers in 2015 and the proportion of drivers in 2020 who use a mobile phone while driving using a 95 confidence interval Use 2015 Drivers 2020 Drivers Enter your answer using interval notation Round your numerical values to four decimal places c Is 0 included in the confidence interval Yes No What does this suggest about the difference in proportions for 2015 and 2020 O It is plausible that the two population proportions could be equal It is not plausible that the two population proportions could be equal d Interpret the confidence interval in the context of this problem We are 95 confident A that the true difference in the proportion of drivers in 2015 who used a handheld mobile phone while driving and the same proportion for drivers in 2020 falls