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The article measured capability of gauge by measuring weights of 2 sheets of paper. Data is in the table.
a) Check suppositions that data from each sheet are from normal dist.
b) Test hypothesis that mean weight of 2 sheets are equal against alternative that they are not(suppose equal variances). Use α=0.05 and suppose equal variances. Determine the P value.
c) Repeat previous test with α=0.10
d) Compare your answers from parts b and c an describe why are they the same or why are they different.
e) Describe how questions in parts b and c could be replied with confidence intervals.
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