SOLUTION: I have submitted this question for the last several days, could someone please help.
Assume that the populations in the previous problem have equal variance. Perform that hypothe
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-> SOLUTION: I have submitted this question for the last several days, could someone please help.
Assume that the populations in the previous problem have equal variance. Perform that hypothe
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Question 961211: I have submitted this question for the last several days, could someone please help.
Assume that the populations in the previous problem have equal variance. Perform that hypothesis test again, pooling the sample variance.
Previous problem is: 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 Assume that the populations 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.
Thank you
