1. You are contemplating buying a new cellphone for your 97-year-old grandmother who is trying to be technologically savvy. You know that she can never remember to charge her current phone but you still want to give her something close to her wish. With this in mind, you are interested in knowing if cellphones without 4G technology allow for longer talk time than those with the technology. Data on talk time for a sample of cellphones based on whether they have 4G technology or not are presented below. Group Statistics SOLO N Talk Time Four Yes NO Mean De 1095 5372 9.00 5571 19 766 56 NOT Construct a 95% confidence interval for the difference in mean cellphone talk times. b)Use the confidence interval in part a) to determine if there is a difference in talk times based on whether the cellphone has 4G technology or not. Use the appropriate inferential method to determine which cellphone you should get for your grandmother. Remember, you suspect that cellphones without 4G have longer talk times. . Based on the necessary assumptions, was the inferential method you used appropriate. Give reasons for your