SOLUTION: Please help me with this question, I have submitted it several times to no avail. An engineer claims that her new battery will operate continuously for at least 7 minutes longer t

Question 960764: Please help me with this question, I have submitted it several times to no avail.
An engineer claims that her new battery will operate continuously for at least 7 minutes longer than the old battery. To test the claim, the company selects a simple random sample of 100 new batteries and 100 old batteries. The old batteries run continuously for 190 minutes with a standard deviation of 25 minutes; the new batteries, 200 minutes with a standard deviation of 35 minutes. Test the engineer's claim that the new batteries run at least 7 minutes longer than the old. Use a 0.05 level of significance.
A) state the null and alternative hypothesis, B) determine the critical value(s) that define the rejection region, C) calculate the value of the test statistic, D) make the decision to reject the null hypothesis or not, and E) state a full conclusion, in context.
Please, please help.

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
See answer to Question 960379
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