Evidence of the mean dimension

Reference no: EM1313695

Auto crank shafts:

Here are measurements (in millimeters) of a critical dimension for 16 auto engine crankshafts:

224.120 224.001 224.017 223.982 223.989 223.961

223.960 224.089 223.987 223.976 223.902 223.980

224.098 224.057 223.913 223.999

The dimension is supposed to be 224 mm and the variability of the manufacturing process is unknown. Is there evidence that the mean dimension is not 224 mm?

1. Based on the p-value and α = 0.025, the null hypothesis (Ho) is:

a. Rejected

b. not rejected

c. Not enough information to draw a conclusion

2. Based on the above analysis (p-value and α = 0.025), we conclude that

a. The mean dimension of the crankshafts is 224mm.

b. The mean dimension of the crankshafts is 224mm.

c. We do not have enough information to draw a conclusion

Reference no: EM1313695

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