Assembly line workers have a certain speed when they assemble together one toy. As an incentive, the headquarters offers a one-time bonus to anyone or any group who can speed up the production. You, a worker on the factory-level, spend a lot of time with the toys and have a new technique in how they are assembled that requires a new tool but makes the whole process much faster. You think if you do a little experiment with 10-15 of your fellow workers with the new technique, you can convince the higher-ups that this is going to increase production and thus make the company more money. You make randomly selected 7 of your friends to work a whole day using the old methods and 7 of your friends using the new method. The data (in number of toys assembled) are: Xold: 13, 12, 17, 21, 9, 17, 11 Xnew: 18, 18, 18, 22, 12, 15, 15 C. Conduct the test. Make a decision about the null hypothesis, interpret your results, and calculate effect size if applicable. At ?=.05can you reasonably say that the new techniqueis betterat assembling more toys? D. Now assume that instead of having separate people doing the different techniques, imagine you made 7 of your friends use the old technique for a day, and then have the same 7 use the new technique for the next day. How would this change things? What would be more appropriate to do?Did this change your conclusions? If yes, why?
Assembly line workers have a certain speed when they assemble together one toy. As an incentive, the headquarters offers a one-time bonus to anyone or any group who can speed up the production. You, a worker on the factory-level, spend a lot of time with the toys and have a new technique in how they are assembled that requires a new tool but makes the whole process much faster. You think if you do a little experiment with 10-15 of your fellow workers with the new technique, you can convince the higher-ups that this is going to increase production and thus make the company more money. You make randomly selected 7 of your friends to work a whole day using the old methods and 7 of your friends using the new method. The data (in number of toys assembled) are:
Xold: 13, 12, 17, 21, 9, 17, 11
Xnew: 18, 18, 18, 22, 12, 15, 15
C. Conduct the test. Make a decision about the null hypothesis, interpret your results, and calculate effect size if applicable. At ?=.05can you reasonably say that the new techniqueis betterat assembling more toys?
D. Now assume that instead of having separate people doing the different techniques, imagine you made 7 of your friends use the old technique for a day, and then have the same 7 use the new technique for the next day. How would this change things? What would be more appropriate to do?Did this change your conclusions? If yes, why?
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