10.11 An important feature of tablets is battery life, the num-ber 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. (Data extracted from “Ratings and rec-ommendations: Tablets,” Consumer Reports, August 2013, p. 24.)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 tablets? 1Use a=0.05.2b. 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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