Exam 3 david - change significant at the 0.05 level...

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Exam 3 Name: David Tran Start time: February 16, 2004 7:40pm Time allowed: 3 days Number of questions: 5 Finish Help TO GET FULL CREDIT FOR A PROBLEM YOU MUST SHOW ALL THE WORK TO GET THE ANSWER. IF YOU GIVE ME JUST THE ANSWER I WILL GIVE YOU ONLY 2 POINTS IF IT IS CORRECT AND 0 IF NOT. Question 1 (6 points) What is the proceedure used to find the equations from which the parameters a & b of the 'least-squares' line y = a + bx are found? Equation: Equation editor Save answer Bottom of Form Question 2 (6 points) In the past the weight of a given production item was 40 ounces with a standard deviation of .32 ounce. A random sample of 20 items showed a standared deviation of .25. Is the
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Unformatted text preview: change significant at the 0.05 level? Equation: Equation editor Save answer Bottom of Form Question 3 (6 points) If for a given sample size n1 I can find the 95% confidence interval, how largre a sample must I take inorder to find the 99% confidence interval? Equation: Equation editor Save answer Bottom of Form Question 4 (6 points) Using the class data find the least-squares line for weight on height. Also find the correlation coeffieient. Equation: Equation editor Save answer Bottom of Form Question 5 (6 points) What is the 95% confidence interval for 100 ohm resister with 5% tolerence Equation: Equation editor Save answer Bottom of Form Finish...
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