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3. The mean breaking strength of the cables supplied by a manufacturer is 1600 with a SD of 90. By a new technique in the

3. The mean breaking strength of the cables supplied by a manufacturer is 1600 with a SD of 90. By a new technique in the manufacturing process, it is claimed that the breaking strength of the cable has increased. To test this claim, a sample of 50 cables is tested and it is found that the mean breaking strength is 1650. Can we support the claim at 5% LOS? (2 Marks)

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