Statistics Task..Please help me...?

A potato chip company packages its potato chips into 12.0 ounce bags. You find it hard to believe that the bag contains enough potato chips to weigh 12.0 ounces and would like to make an official complaint. Before doing so, you decide to run an experiment so that you can have some confidence that the company’s claim is incorrect. Over the next several months you buy 30 bags of potato chips and weigh the contents of each one. You discover that the mean weight is 11.9 ounces with a standard deviation of 0.4 ounces. You decide that you will only complain if you can be 95% sure that the bags do not contain at least 12.0 ounces of potato chips.





Task:


A. Determine if this is a one-tailed or two-tailed test. Justify your decision.


B. State the null hypothesis and alternative hypothesis. Your null hypothesis should assume the company’s claim is correct.


C. Define the term Type I error and explain what a Type I error is in terms of this problem.

Statistics Task..Please help me...?
In all the time it took you to type that in you should have worked on the problem.
Reply:It is a one-tail test, because you are only interested if the weight is less than 12 ounces. The null would be that the weight is equal to 12 and the alternative would be that it is less than twelve. Type One error would be concluding that is not 12 when in fact it is, and Type Two error would be concluding that it is 12 when it is not.
Reply:I'm gonna guess that you are in MQTA right now and confused. Sorry I can't help.