Exercise 6-23 [LD-d} The speed with which utility companies. can resolve problems is very important. GTE, the George Telep hone Company, reports it can T'EEEDI'H'E customer problems the same day they are reported ir the cases. Suppose the 15 cases reported today are representative of all complaints- a-ZL How many of the problems would you expect to be resolved today? [Round your answer in decimal places.) Huntrer of Patients I a-E. What is the standard deviation? [Hound your answer to 4 decimal places.) Statdardewion I b. What is the probability 7" of the problems can be resohiied today? [Hound your answer to 4 d places.) c. What is the probability Ti" or E of the problems can be resolved to-tlay';l {Round your answer It decimal places.) i Pmbability d. What is the probability more than it] of the problems can be resolved today\"? [Hound your an 4 decimal places.) Probability I