A computer battery is found to have a mean time between charges of 13 hours. A modification is made which is supposed to increase battery life. Test on a random sample of 35 modified computers resulted in mean battery life of 13.6 hours with a standard deviation 0.5 hours. At the 95% confidence level, test the claim that the mean time between charges is longer after the modification.

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices