Most computer laptops use a rechargeable lithium-ion battery. However, with brighter computer displays and more powerful chips, batteries are not lasting any longer. to determine the avg. number of hrs of use that a college student gets on a laptop before the batteries fail, 51 students were randomly selected, and values of the variable LaptopBatteryLife were recorded. find a 90% confidence interval for the mean battery lifetime. Use a t-distribution. Repeat, using normal distribution with sigma = 1.202583 and compare the two confidence intervals
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