MAT 240 TEST 8-3 MYSTATLAB: FINAL EXAM
Question # 00538951
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Updated on: 06/02/2017 09:09 AM Due on: 06/02/2017
Question Help In- In rendornized. doublebtlnd clinical trials of a new vaccine. rats were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a IInlrol wooine. A?er the first dose. 114 of
702 subfecb in the experimental group (group 1) experienced vomiting a5 a side Iifeot. After the ?rst dose, 63 of 605 oi the subjects in the control group (group 2] experienced vomiting as a side effect. Construct a 95% con?dence
interval for the ditferenm between the two population proportions, p1 —p2. Use :1 =114‘ n1 =i'021 :2 =68, and n2 =605‘ The 95% con?dence interval For [7; —p2 is ( , ). (Use ascending order Round to three decimal pieces as needed.) Enter your answer in each of the erewer boxes.
702 subfecb in the experimental group (group 1) experienced vomiting a5 a side Iifeot. After the ?rst dose, 63 of 605 oi the subjects in the control group (group 2] experienced vomiting as a side effect. Construct a 95% con?dence
interval for the ditferenm between the two population proportions, p1 —p2. Use :1 =114‘ n1 =i'021 :2 =68, and n2 =605‘ The 95% con?dence interval For [7; —p2 is ( , ). (Use ascending order Round to three decimal pieces as needed.) Enter your answer in each of the erewer boxes.
Question Help In- A researcher studies water clarity at the same location in a lake on the same dates during the course of a year and repeats the measurements on the same dates 5 years later. The researcher immerses a weighted disk painted
otaok and white and measures the depth (in indies) at which it ts ne tonger visible. The collected data Es given in the table below. Complete parts (a) and lb} beiow. Observation 1 2 3 4 5 B Q
Date #25 SHE area m 9f13 111’?
Initial 41‘? 54.5 50.9 613! 57‘? 57A. Alter?veyears 45.0 55.3 52.2 63.9 61.5 55.2 [a] Why '5 it important to take the measurements on the same date? 0 A. Using the same dates maximizes the d‘rfferenm in water clarity. O B. Those are the same dates that eti biologists use to take water clarity samples.
0 C. Using the same dates makes it easier to remember to take samples. 0 D. Using the same dates makes the second sample dependent on the ?rst. [bl Does the evidence suggest that the otarity of the lake is improving at the a = 0.05 level at signi?cance? Note that the nonnai prubabEiity plot and boxplot of the data indicate that the di?erences are apprwcimately normally
distributed with no outliers. Choose the correct conclusion below. 0 Do not reject H0.
0 Reject HD. Stick to select your answer.
otaok and white and measures the depth (in indies) at which it ts ne tonger visible. The collected data Es given in the table below. Complete parts (a) and lb} beiow. Observation 1 2 3 4 5 B Q
Date #25 SHE area m 9f13 111’?
Initial 41‘? 54.5 50.9 613! 57‘? 57A. Alter?veyears 45.0 55.3 52.2 63.9 61.5 55.2 [a] Why '5 it important to take the measurements on the same date? 0 A. Using the same dates maximizes the d‘rfferenm in water clarity. O B. Those are the same dates that eti biologists use to take water clarity samples.
0 C. Using the same dates makes it easier to remember to take samples. 0 D. Using the same dates makes the second sample dependent on the ?rst. [bl Does the evidence suggest that the otarity of the lake is improving at the a = 0.05 level at signi?cance? Note that the nonnai prubabEiity plot and boxplot of the data indicate that the di?erences are apprwcimately normally
distributed with no outliers. Choose the correct conclusion below. 0 Do not reject H0.
0 Reject HD. Stick to select your answer.
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Solution: MAT 240 TEST 8-3 MYSTATLAB: FINAL EXAM