9 A medical doctor studied the effects of two chest tube clearance protocols on drainage in...

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9 A medical doctor studied the effects of two chest tube clearance protocols on drainage in patients after myocardial revascularization surgery. In other words, after a heart episode the doctor investigated two protocols for drainage out a chest tube from a patient. The two protocols are called milking and stripping. The summary statistics for drainage during the next 8 hours for the two chest tube clearance protocols are shown below. With this data the doctor wishes to create a 99% confidence interval to estimate the difference between the mean of milking and stripping protocol drainage ("milking - "stripping). (Note: mL stands for milliliters) Protocol Milking Stripping n Mean Standard Deviation 100 541.6 mL 380 mL 100 515.8 mL 311 mL i. Using complete sentences, explain if each of the four validity requirements is fulfilled. (4 points) 1. Random Sample/Randomized Experiment 2. Independent observations (n 0.05N; n 0.05N2) 3. Normal populations or n 30; n 30 4. Independent samples ii. (Continued from previous page) Write an appropriate interpretation for the confidence interval using the results given below. (2 points) Sample 1 Mean 541.6 Sample 2 515.8 S 380 311 N 100 100 SE 49.1041 df 190.5494 Lower Limit -101.9627 Upper Limit 153.5627 iii. Does this interval provide evidence that the mean drainage of the milking protocol is different than the mean drainage of the stripping protocol? (2 points) A) Yes, the point estimate of 25.8 mL is positive, so the mean of milking protocol drainage is higher than the mean stripping protocol drainage. B) No, the point estimate of 25.8 mL is positive, so the mean of milking protocol drainage is lower than the mean stripping protocol drainage. C) Yes, the interval contains only negative values, so the mean of milking protocol drainage is more than the mean of stripping protocol drainage. D) No, the interval contains only positive values, so the mean of milking protocol drainage is more than the mean of stripping protocol drainage. E) No, the interval contains zero, so it's possible that there is no difference between the mean drainage of the different protocols. F) Can't be determined. 9 A medical doctor studied the effects of two chest tube clearance protocols on drainage in patients after myocardial revascularization surgery. In other words, after a heart episode the doctor investigated two protocols for drainage out a chest tube from a patient. The two protocols are called milking and stripping. The summary statistics for drainage during the next 8 hours for the two chest tube clearance protocols are shown below. With this data the doctor wishes to create a 99% confidence interval to estimate the difference between the mean of milking and stripping protocol drainage ("milking - "stripping). (Note: mL stands for milliliters) Protocol Milking Stripping n Mean Standard Deviation 100 541.6 mL 380 mL 100 515.8 mL 311 mL i. Using complete sentences, explain if each of the four validity requirements is fulfilled. (4 points) 1. Random Sample/Randomized Experiment 2. Independent observations (n 0.05N; n 0.05N2) 3. Normal populations or n 30; n 30 4. Independent samples ii. (Continued from previous page) Write an appropriate interpretation for the confidence interval using the results given below. (2 points) Sample 1 Mean 541.6 Sample 2 515.8 S 380 311 N 100 100 SE 49.1041 df 190.5494 Lower Limit -101.9627 Upper Limit 153.5627 iii. Does this interval provide evidence that the mean drainage of the milking protocol is different than the mean drainage of the stripping protocol? (2 points) A) Yes, the point estimate of 25.8 mL is positive, so the mean of milking protocol drainage is higher than the mean stripping protocol drainage. B) No, the point estimate of 25.8 mL is positive, so the mean of milking protocol drainage is lower than the mean stripping protocol drainage. C) Yes, the interval contains only negative values, so the mean of milking protocol drainage is more than the mean of stripping protocol drainage. D) No, the interval contains only positive values, so the mean of milking protocol drainage is more than the mean of stripping protocol drainage. E) No, the interval contains zero, so it's possible that there is no difference between the mean drainage of the different protocols. F) Can't be determined.