In a Manufacturing Facility Producing Fasteners,a Foreman Suspects That the Diameter

question 92

Multiple Choice

In a manufacturing facility producing fasteners,a foreman suspects that the diameter of the bolts produced by his first-shift workers is greater than the diameter of the bolts produced by his second-shift workers.He takes a sample of 5 bolts from the first shift and a sample of 4 bolts from the second shift and measures the diameters in inches.Below are the results from 5 first shift and 4 second-shift observations.The bolt diameter measurements are not normally distributed. $$\begin{array} { c c } & { \text { Bolt Diameter (inches) } } \\\text { 1st shift } & \text { 2nd shift } \\2.01 & 1.80 \\2.25 & 1.95 \\1.98 & 2.30 \\2.05 & 2.00 \\2.03 &\end{array}$$
At ? = .05,can we conclude that his suspicion is correct?

• A)Reject the null hypothesis,the diameter is greater for 1^st shift versus 2^nd shift.
• B)Do not reject the null hypothesis,there is no evidence that the diameters differ by shift.
• \[\begin{array} { c c }

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