Statistics Question involving null hypothesis, alternative hypothesis, and test statistic

Posted on 2014-04-01 12:39:00 in Statistics by MIA

I am sorry about asking this question, but I'm desperate. I've been looking for how to solve this problem everywhere, my textbook, my notes, but I seem to be hitting a wall. Here is the Problem with the answers.



Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Don't assume that the population standard deviations are equal.



Medium Lead Level = 72, 94, 92, 85, 88, 97, 83, 92, 102, 111, 91



High Lead Level: n2 = 11, x(- should be over x)2 = 89.989, s2 = 9.999



Use a 0.05 significance level, and test the claim that the mean IQ scores for subjects with medium head levels and population 2 consists of subjects with high lead levels. (I understand this part)

H0: u1=u2

H1: u1>u2



Use technology to find the test statistic which is 0.36.



Use technology to find the p-value which is 0.361.



What I'm confused on is how to use technology for this part. I tried solving it by entering the data from medium lead level by pressing stat then clicking edit and inputting the data. From there I'm lost. If you could please help me figure this out I would appreciate it because I have a test coming up and I'm scared of it because of this problem.



Thank you for your help.

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