12) Choose the correct statement, based on your work in the previous 9 problems. a) We failed to prove that the mean bum

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12) Choose the correct statement, based on your work in the previous 9 problems. a) We failed to prove that the mean bumper repair cost is less on small cars but common sense would show that it is. b) The mean repair cost for small cars is no different from the mean repair cost of midsize cars, in fact, it might be greater. c) If I get into an accident that damages my bumper and I drive a midsize car, I can expect to pay, on average, more than if I were driving a small car. d) Small cars have smaller bumpers and so it is common sense that repair costs would be less, but the data did not uphold this.
9) See problem 3. State the technical conclusion based on the pvalue method. a) The pvalue is greater than alpha; Reject Ho. α=0.05≪ bigoer (b) The pvalue is less than alpha; Reject Ho. PV=1.9705×10−4 c) The pvalue is greater than alpha; FTR Ho. PV<∞ d) The pvalue is less than alpha; FTR Ho. If PV is less than alpha, then reject Ho. 10) See problem 3. State the technical conclusion based on the CI method. a) The Cl contains zero; FTR Ho. b) The Cl does not contain zero; FTR Ho. CI:(−407,−130) c) The Cl contains zero; Reject Ho. d) The Cl does not contain zero; Reject Ho. Reject Ho if O is not in the CI. 11) See problem 3. State the non-technical conclusion. a) There is sufficient evidence to warrant rejection of the claim that the mean bumper repair cost for small cars is less than for midsize cars. b) There is not sufficient evidence to warrant rejection of the claim that the mean bumper repair cost for small cars is less than for midsize cars. (c) The sample data support the claim that the mean bumper repair cost for small cars is less than for midsize cars. d) There is not sufficient sample evidence to support the claim that the mean bumper repair cost for small cars is less than for midsize cars.
3) In crash tests at 5mph, the mean bumper repair cost for 14 randomly selected small cars \{group 1) was 5473 , with standard deviation $190. In similar tests of 22 midsite cars (group 2), the mean bumper repair cost is $741, with standard deviation $205. Use a 0.05 significance level to test the claim that the mean bumper repair cost for small cars is less than for midsize cars. State the null and alternative hypotheses. b) Ho:μ1≤μ2 Hμ1>μ1 (d) H∈μ1≥μ2 4) See problem 3. State the critical value. Hint: use the df your calculator provides (and Table A-3), so maybe you should do the next two problems and then come back to this ane. α=0,05(kff−taited) 지 1.691 b) 1.688 (c) −1.691 d) −3.962 df Lfror calculater )=34tcr=t0.05,34 use table A−3 Anegative since pointing leftt cr=t0,05,34 5) See problem 3. Perform STATSTESTS>2−SAMPTTest, and then report your test statistic. Hint: should be YES. a) 3.931 b) 1.19705 c) 2.973 (d) −3.931 Stat>tests>2-SampT-Test 6) See problem 3. Calculate the pvalue. a) 0.0039 b) 1.9705 (c) 1.9705×10−4 d) 0.0025 Got fium calculator un last problem 7) See problem 3. Calculate the appropriate confidence interval, (a) (−407,−130) b) (−406.5,−129.5) c) (−383,−153) d) (−454,−82) Round same as 3 and xˉ. 1−0.05=0.95 8) See problem 3. State the technical conclusion based on the traditional method. a) The test statistic is closer to zero than is the critical value; Reject Ho. tcr=−1.691 b) The test statistic is closer to zero than is the critical value; FTR Ho. tcaic =−3.931 (Ucit (c) The test statistic is further from zero than is the critical value; Reject Ho. d) The test statistic is further from zero than is the critical value; FTR Ho.