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A graphite manufacturer makes long rolls of flexible graphite tobe used to seal components in combustion engines. Thespecifications state that the mean strength should be 21.2 ouncesper square yard with a standard deviation of 0.29. Furtherspecifications state that no roll should have strength less than20.2 or more than 22.2 ounces per square yard. If there is a defectin terms of the strength of the graphite rolls, the seal will nothold.After the roll is created, a beta scanner takes measures thestrength in ounces per square yard. The dataare separated into 10 lanes with 20 scans in each lane. Asamples in a lane consist of scans from one roll. Taking thevariation in strength to be random and to have normaldistribution then a) Do the scanned data confirm the required strength and itsvariance for the graphite film ?b) What is the probability that produced film will be out ofspecs?
Graphite Production Table: