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please show work and steps, thank u 7. Consider the data on the lifetime in months of two cell phone batteries shown below. Which battery

please show work and steps, thank u

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7. Consider the data on the lifetime in months of two cell phone batteries shown below. Which battery has a higher probability of needing replacement in less than 45 months. Explain with mathematical calculations and reasoning [3 marks] Battery A Mean = 36.6, Standard Deviation=9.5 Battery B Mean = 40.7, Standard deviation =4.3

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