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it View History Bookmarks People Window Help . Take a Test-Erla Teli Secure https://www.mathxl.com/Student/PlayerTest.aspxtestld 1744851648centerwin yes MAT 206-Winter 2017-2018 Erla Toi | 1/9/18 11:38 P Time Remaining: 00.20:09 Submit Te This Test: 19 pts possi Test: Online Test-Ch. 11 and Ch. 12 his Question: 1 pt 7of19(200m plete) The following data recorded using two different measuring devon·muting ite flowing data. represent the muzzle velocity (in feet per second) of shells fred from a 155-mm gun. For each shell, two measurements of the Observation 1 2 3 4 5 6 792.5 7934 793.5 791.7 7912 793.4 801.3 792.0 789.1 7873 7908 7949 B. a) vwny are these matcnea-pairs oatar O A. All the measurements came from rounds fred from the same gun. OB The measurements (A and B) are taken by the same instrument. ° C. The same round was ted n every trial. O D. Two measurements (A and B) are taken on the same round. (b) isthere a difference r the measurement of the muzze velocty between device A and device B t the .0.01 level of signicance? Note: A normal probably plot and boxplot of the data indicate that the differences are approximabely normaly distributed with no outliers. What is your condlusion regarding Ho O Do not reject Ho O Reject Ho (c) Construct a 99% cofidence interval about the uladon mean difierence. Comane the difereroe as devoe A mna device a lmerprogresis The confidence interval isD (Round to three decimal places as needed.) Choose the statement that best agrees with your interpretion of your results OA. Iam 16% corfident that the mean difference in measurement is 001 O B. I am 16% confident that the mean dflorence in measurement is 0. OC. Iarm 99% confident that mean difference in measurement les in the intonal ford above OD. Iam 1% confident mean that the mean difference in measurement lies in the inberval found above Click to select your answerfs). sw 2p rS F3 F2Explanation / Answer
1) D- Two measurements( A and B) are taken on the same round.
2) Difference is not statically significant, we fail to reject the null hypothesis.
3)
95% confidence interval of this difference: From -5.073 to 5.239
99% confidence interval is( 0.083 + 6.694 , 0.083-6.694) = -6.61,6.77
d) correct answer is c. We are 99% confident that mean difference in measurement is in the CI found above.
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