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The manufacturer of a new fishing line claims this line has a mean breaking strength of 7.50 kg with a standard deviation of 0.10 kg.

The manufacturer of a new fishing line claims this line has a mean breaking strength of 7.50 kg with a standard deviation of 0.10 kg. A random sample of 10 lines was tested and found to have a mean breaking strength of 7.55 kg. Use a 0.05 level of significance to test the hypothesis that = 7.50 kg against the alternative that 7.50 kg.

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