(Answered) An important feature of tales is vattery life the number of

Statistics

An important feature of tales is vattery life, the number of hours before the battery needs to be recharged. The file Tablets contains the battery life of 12 WiFi-only and 7 3G/4G/WiFi 9 through 12-inch tablets.

a. Assuming that the population variances from both types of tablets are equal, is there evidence of a difference in the mean battery life between the two types of tables? (Use a=0.05)

b. Determine the p-value in (a) and interpret its meaning.

c. Assuming that the population variances from both types of tablets are equal, construct and interpret a 95% confidence interval estimate of the difference between the population mean battery life of the two types of tablets.

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