a 0940 b 0000 c 0121 d 0360 e 0060 Question 12 Your answer is INCORRECT The

A 0940 b 0000 c 0121 d 0360 e 0060 question 12 your

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a) 0.940 b) 0.000 c) 0.121 d) 0.360 e) 0.060 Question 12 Your answer is INCORRECT. The weight of bolts produced by a machine has standard deviation of 0.06 pounds. Assuming that the distribution is normal, what is the minimum sample size needed to determine with a precision of ±0.005 pounds the mean weight of the produced bolts for a 95% confidence interval? a) 277 b) 554 c) 100 d) 24 e) 1107 Question 13 Your answer is CORRECT. Select the equation of the least squares line for the data: (44.20, 1.30), (42.25, 3.25), (45.50, .65), (40.30, 6.50), (39.00, 5.85), (35.75, 8.45), (37.70, 6.50). a) ŷ = -37.643 − 0.81100 x b) ŷ = 37.643 − 0.81100 x c) ŷ = 41.407 − 0.89210 x d) ŷ = 37.643 − 0.89210 x e) ŷ = 0.81100 x − 37.643 Question 14 Your answer is CORRECT.
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This is a written question, worth 14 points. DO NOT place the problem code on the answer sheet. A proctor will fill this out after exam submission. Show all steps (work) on your answer sheet for full credit. Problem Code: 1484 The following data are for intelligence-test (IT) scores, reading rates (RR), and grade-point averages (GPA) of 8 at-risk students. IT 155 206 156 172 209 191 163 207 RR 43 33 27 35 25 36 36 26 GPA 3.0 2.0 1.7 2.5 2.0 2.7 2.6 1.8 Part a : Calculate the line of best fit that predicts the GPA on the basis of RR scores. Part b : Calculate the line of best fit that predicts the GPA on the basis of IT scores. Part c : Which of the two lines calculated in parts a and b best fits the data? a) I have placed my work and my answer on my answer sheet. b) I want to have points deducted from my test for not working this problem. Question 15 Your answer is CORRECT. This is a written question, worth 14 points. DO NOT place the problem code on the answer sheet. A proctor will fill this out after exam submission. Show all steps (work) on your answer sheet for full credit. Problem Code: 1571 Suppose that in a large metropolitan area, 80% of all households have cable tv. Consider selecting groups of five households, and let X be the number of households in a group that have cable tv. Part a: Verify that this is a binomial distribution. Part b: For what proportion of groups will exactly four of the five households have cable tv? Part c: For what proportion of groups will at most two of the households have cable tv? Part d: What is the proportion of groups for which at least three of the five households have cable tv? a) I have placed my work and my answer on my answer sheet. b) I want to have points deducted from my test for not working this problem. Question 16 Your answer is CORRECT. This is a written question, worth 14 points. DO NOT place the problem code on the answer sheet. A proctor will fill this out after exam submission. Show all steps (work) on your answer sheet for full credit. Problem Code: 1643 The data for gas mileage (in mpg) for four different types of vehicles was compared. For type of vehicle, ten were chosen and gas mileage recored. The sample means are shown below.
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