Show transcribed image text 3) Two crankshaft manufacturers, A and B, are being considered as suppliers for an engine. Both manufacturers claim a mean fatigue life of 1.5 billion stress cycles. Because manufacturer A uses a slightly superior machining process (at a slightly higher cost), the standard deviation of the fatigue life for manufacturer A is 0.2 billion, while the standard deviation of fatigue life for manufacture B is 0.25 billion. A random sample of 10 crankshafts is taken from each manufacturer and fatigue lives of each measured, giving the following results (in billions); = {1.8.1.9.2.0. 2.0. 1.7.1.6.1.1. 1.3.1714) a) Can it be concluded that the fatigue lives are different for the two manufacturers? Test using a = 0.05. b) What is the p-value for this test?
3) Two crankshaft manufacturers, A and B, are being considered as suppliers for an engine. Both manufacturers claim a mean fatigue life of 1.5 billion stress cycles. Because manufacturer A uses a slightly superior machining process (at a slightly higher cost), the standard deviation of the fatigue life for manufacturer A is 0.2 billion, while the standard deviation of fatigue life for manufacture B is 0.25 billion. A random sample of 10 crankshafts is taken from each manufacturer and fatigue lives of each measured, giving the following results (in billions); = {1.8.1.9.2.0. 2.0. 1.7.1.6.1.1. 1.3.1714) a) Can it be concluded that the fatigue lives are different for the two manufacturers? Test using a = 0.05. b) What is the p-value for this test?
