The replacement times for cell phones are normally

Last updated: 7/10/2022

The replacement times for cell phones are normally distributed with mean 3.1 years and standard deviation 0.8 years. What length of time separates the top 5% of cell phone replacements from the rest? The replacement time cut-off for the top 5% is 11.1 years 3.2 years 4.7 years 4.4 years 5.2 years