Question

Here are measurements (in millimeters) of a critical dimension for a random sample of 16 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 data come from a production process that is known mean is supposed to be = 224 mm. Is there sufficient evidence that the mean dimension is not 224 mm? Give appropriate statistical evidence to support your conclusion. Alpha = .05

a. State the question you would like to answer, your null and alternative hypotheses

b. Calculations: Include t score and p-value

c. Conclusion: Rejection decision, why, and answer to the question.

Answer 1