2. A crush resistance testing of steel plate produced by a manufacturer have mean 1800 kg and standard deviation 100 kg. By a new technique in the manufacturing process it is claimed that the crush resistance can be increased. To test this claim, a sample of 50 stee plates is tested, and it is found that the mean crush resistance is 1850 kg. (a) Can we support the claim at a 0.01 level of significance? (b) What is the P-value of the test?

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2. A crush resistance testing of steel plate produced by a manufacturer have mean 1800 kg
and standard deviation 100 kg. By a new technique in the manufacturing process it is
claimed that the crush resistance can be increased. To test this claim, a sample of 50 steel
plates is tested, and it is found that the mean crush resistance is 1850 kg. (a) Can we
support the claim at a 0.01 level of significance? (b) What is the P-value of the test?
Transcribed Image Text:2. A crush resistance testing of steel plate produced by a manufacturer have mean 1800 kg and standard deviation 100 kg. By a new technique in the manufacturing process it is claimed that the crush resistance can be increased. To test this claim, a sample of 50 steel plates is tested, and it is found that the mean crush resistance is 1850 kg. (a) Can we support the claim at a 0.01 level of significance? (b) What is the P-value of the test?
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