l ' A toll-free phone number is available from 9 am. to 9 pm. for your customers to register complaints about a product purchased from your company. Past history indicates that an average of 0.6 calls are received per minute. Complete parts (a) through (d). I W ' a. What properties must be true about the situation described here in order to use the Poisson distribution to calculate l probabilities concerning the number of phone calls received in a 1-minute period? i1= Select all the assumptions for a Poisson distribution. l i E] A. At least 30 calls are received. D B. The probability of a phone call is the same in any given 1-minute period. 3