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IBL Company manager asked his statistic team to give to the production department the data on the number of phones manufactured over the 20 months.. The data collected are as follows: TABLE 1 Months # of phones produced 2045 1566 12,075 4563 - - 5052: 3465 2542 4134 3567 5163 4563- . 7453 262 4772 4563 + 5052. 4563. 5052.. 4130 5052