The following data represent the running times offilms produced by 2 motion-picture companies:

Company                   Time(minutes)                              

         1                102  86    98    109   92

         2                81    165  97    134  92    87     114

Write out the hypothesis that the average running time offilms produced by company 2 exceeds the average running time offilms produced by company 1 by 10 minutes.

 

Answer:

This is as simple as an either or situation. So

Null Hypothesis, H_o; =Average runningtime of films produced by company 2

                               exceeds the average running time of films produced by

                              company 1 by 10 minutes

Alternative hypothesis, H_a; =Average running timeof films produced by

                                company 2 doesnot exceed the average running time

                             of films produced by company 1 by 10 minutes.

The hypothesis here is that Average running time offilms produced by company 2  exceeds the averagerunning time of films produced by company 1 by 10 minutes and intesting this hypothesis it will either prove to be true thatcompany 2 exceeds company 1 by 10 minutes or not. If the testcomes true then Ho is accepted and Ha rejected. if the testcomes false then Ho is rejected and Ha is accepted. Remember thatthis analysis will also take into account error parameters underconsideration.