Laptop Battery Charge Time Narrative
A computer laboratory manager must choose between three brands of battery packs for use in a laboratory of laptop computers. A major concern is the time, in hours, the battery packs will function before needing to be recharged. The manager obtains a random sample of eight observations for each of the three brands and records the following information: = 1150.72, and = 165.6
-Refer to Laptop Battery Charge Time Narrative. Develop and interpret a 90% confidence interval for .

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Laptop Battery Charge Time Narrative
A computer laboratory manager must choose between three brands of battery packs for use in a laboratory of laptop computers. A major concern is the time, in hours, the battery packs will function before needing to be recharged. The manager obtains a random sample of eight observations for each of the three brands and records the following information:   = 1150.72, and  = 165.6
-Refer to Laptop Battery Charge Time Narrative. Develop and interpret a 90% confidence interval for  .

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The Answer of Laptop Battery Charge Time Narrative
A computer laboratory manager must choose between three brands of battery packs for use in a laboratory of laptop computers. A major concern is the time, in hours, the battery packs will function before needing to be recharged. The manager obtains a random sample of eight observations for each of the three brands and records the following information:   = 1150.72, and  = 165.6
-Refer to Laptop Battery Charge Time Narrative. Develop and interpret a 90% confidence interval for  .