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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
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 O 11.1 years O 3.2 years O 4.7 years O 4.4 years 5.2 years
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