|
Paper
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|
|
|
|
|
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1
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3.481
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3.448
|
3.485
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3.475
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3.472
|
|
|
3.477
|
3.472
|
3.464
|
3.472
|
3.470
|
|
|
3.470
|
3.470
|
3.477
|
3.473
|
3.474
|
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2
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3.258
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3.254
|
3.256
|
3.249
|
3.241
|
|
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3.254
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3.247
|
3.257
|
3.239
|
3.250
|
|
|
3.258
|
3.239
|
3.245
|
3.240
|
3.254
|
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.