Hypothesis test for difference between mean equal variance

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Reference no: EM1312139

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1

3.481

3.448

3.485

3.475

3.472

 

3.477

3.472

3.464

3.472

3.470

 

3.470

3.470

3.477

3.473

3.474

2

3.258

3.254

3.256

3.249

3.241

 

3.254

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.

Reference no: EM1312139

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