2-Sided CI, a 95, Sample Average = 100, Sample St Dev, s  5,  15                                                       ____________   <  m  <   ____________

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  1. 2-Sided CI, a 95, Sample Average = 100, Sample St Dev, s  5,  15

                                                      ____________   <  m  <   ____________

  1. 2-Sided CI, a 95, Group 1: Sample Average = 100, Sample St Dev, s  5,  20; Group 2: Sample Average = 98, Sample St Dev, s  3,  30.  Assume the unknown group variances are equal.

                                                      ____________   <  m1  m2  <   ____________

 

  1. Is the difference in Group Averages in Part D above, statistically significant (a 95).  The alternate hypothesis is m1  m2.    YES   or   NO
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