- 24 - Section 6.3 Inference for a Difference in Proportions Question 5 - /1 Question 7 of 19 -/1 E View Policies Current Attempt in Progress Are Errors Less Likely with Electronic Prescriptions? Errors in medical prescriptions occur and a study1 examined whether electronic prescribing may help reduce errors. Two groups of doctors used written prescriptions and had similar error rates before the study. One group switched to eprescriptions while the other continued to use written prescriptions, and error rates were measured one year later. The results are given in Table 1. Error No Total Error Electronic 254 3594 3848 Written 1478 2370 3848 Table 1 Are prescription error rates different? Find a 99% condence interval for the difference in the two proportions, pw pe, where p", is the proportion of errors using written prescriptions and pe is the proportion of errors using e-prescriptions. Round your answers to three decimal places. The 99% condence interval is n to a Is it plausible that there is no difference? 1Kaushal, R., et' al., "Electronic Prescribing Improves Medication Safety in Community-Based Ofce Practicesf'Joumalof General internal Medicine, June 2010; 25(6): 530-536. eTextbook and Media Save for Later Attempts: O of 4 used Blank Question 7 Math Fill in the Blank Viewing Question 8 Math Fill in the Blank Question 9 MU tipart Question 10 Mu tipart Question 11 Mu tipart Question 12 Mu tipart Question 13 Mu tipart Question 14 Mu tipart Question 15 Mu tipart Question 16 MU tiple Choice Question 17 Not started -/1 Unsubmitted work / 1 Not started / 1 Not stared / 1 Not stared / 1 Not stared -/ 1 Not stared -/ 1 Not stared -/ 1 Not stared -/ 1 Not stared / 1 Not started 14 - 24 - Section 6.3 Inference for a Difference in Proportions Question 9 of 19 - 11 5 Question 2 0.5 / 1 Multipart ) Partially correct View Policies Current Attempt in Progress Question 3 1/1 Multipart Correct Test whether there is a difference between two groups in the proportion who voted, if 45 out of a random sample of 69 in Group 1 voted and 56 out of a random sample of 99 in Group 2 voted. Question 4 1/1 Multipart Correct (a) Find the relevant sample proportions in each group and the pooled proportion. Question 5 /1 Math Fill in the Round your answers to three decimal places. Blank Not started P 1= i Question 6 - / 1 Math Fill in the i Blank Not started P 2 = p = Question 7 /1 Math Fill in the Blank Unsubmitted work e Textbook and Media Question 8 /1 Math Fill in the Blank Not started (b) State the null and alternative hypotheses. Viewing Question 9 ./ 1 Not started Multipart :: = : # 8: : \\mu :: \\mu_1 :: \\mu_2 :: p 2 p_1 :: p_2 :: - :: \ ho :: 2 :: P1 :: P2 Question 10 1 1 :: p Multipart Not started Question 11 /1 Ho: VS Ha: Multipart Not started Question 12 -/1 Multipart Not started e Textbook and Media Question 13 - /1 Multipart Not started (c) Give the test statistic and the p-value. Question 14 ./ 1 Multipart Not started Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. Question 15 1 1 test statistic = i Multipart Not started p-value = i Question 16 /1 Multiple Choice Not started What is the conclusion? Question 17 v Ho. /1 Math Fill in the Blank Not started e Textbook and Media Question 18 /1 Math Fill in the Blank Not started Save for Later Attempts: 0 of 4 used Submit Answer Question 19 -/1- 24 - Section 6.3 Inference for a Difference in Proportions Question 10 of 19 - 11 3 Question 2 0.5 / 1 Multipart Partially correct View Policies Current Attempt in Progress Question 3 1/1 Multipart Correct Test whether patients getting Treatment 1 are more likely to survive, if 63 out of 83 getting Treatment 1 survive and 31 out of 68 getting Treatment 2 survive. Question 4 1/1 Multipart Correct (a) Find the relevant sample proportions in each group and the pooled proportion. Question 5 /1 Math Fill in the Round your answers to three decimal places. Blank Not started P 1= i Question . / 1 Math Fill in the i Not started P 2 = Blank p = Question 7 /1 Math Fill in the Blank Unsubmitted work e Textbook and Media Question 8 . / 1 Math Fill in the Not started Blank (b) State the null and alternative hypotheses. Question 9 /1 Multipart Not started :: = : :: \\mu : \\mu_1 *: \\mu_2 :: p *: p_1 :: p_2 :: - *: \ ho Viewing / 1 :: > # 1 : M1 : 12 : P # P1 : P2 :: Viewing Question 10 :: X2 :: p : P1 :: P2 Not started Multipart Question 11 /1 Ho: VS Ha:[ Multipart Not started Question 12 /1 Multipart Not started e Textbook and Media Question 13 1 1 Multipart Not started (c) Give the test statistic and the p-value. Question 14 Multipart Not started Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. Question 15 test statistic = Multipart Not started p-value = Question 16 1 1 Multiple Choice Not started What is the conclusion? Question 17 v Ho. /1 Math Fill in the Blank Not started e Textbook and Media Question 18 /1 Math Fill in the Blank Not started Save for Later Attempts: 0 of 4 used Submit Answer Question 19