Mathematics, 20.10.2020 14:01 ehhshsh
1. Two rival manufacturers of penlight batteries claimed that their product lasts longer than the other. Thirty samples of Brand A and thirty-four of Brand B were tested. The following are the lengths of lives of such batteries recorded in hours. Use .
Brand A
38 41 42 36 39 41 43 35 36 38 42 39 40 43 44
35 40 39 37 40 42 44 38 37 41 40 38 42 45 41
Brand B
38 40 41 43 39 41 40 43 39 38 40 43 44 39 40 41 42
39 40 45 40 38 42 41 40 36 37 41 42 40 36 38 41 40
solution:
H0:
Ha:
Level of significance:
Type of test and critical region/ p value:
Computations/ excel output
Decision:
Conclusion
Answers: 2
Mathematics, 21.06.2019 19:30, apere655
Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.
Answers: 1
1. Two rival manufacturers of penlight batteries claimed that their product lasts longer than the ot...
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