Question

Use the following data for the entirety of this quiz. Researchers combined the results from three experiments to investigate whether chest compression only (CC) would improve a heart attack victim's chance of survival compared to standard cardiopulmonary resuscitation (CPR). In each experiment, the emergency services dispatcher randomly assigned either the CC or CPR instructions to a bystander who was at a site where a person had just experienced a heart attack. The results are organized in the table below: Survived? Yes No Total 211 1289 1500 CPR 178 1353 1531 Total 389 2642 3031 Question 1 (1 point) Identify the observational units. Cases of heart attacks where emergency services were called Whether given CC or CPR instructions People who survived heart attacks Whether the heart attack victim survived or not nal Haruha: Attempt 1 Question 2 (1 point) 2 Identify the explanatory variable. Whether given CC or CPR instructions People who survived heart attacks Cases of heart attacks where emergency services were called Whether the heart attack victim survived or not 6 8 9 11 12 14 15 Question 3 (1 point) Identify the response variable. 17 Whether given CC or CPR instructions Whether the heart attack victim survived or not People who survived heart attacks Cases of heart attacks where emergency services were called Question 6 (1 point) Calculate the proportion of those given CPR instructions who survived the heart attack. Round your answer to three decimal places. Your Answer: Answer Question 7 (1 point) Calculate the overall survival rate, regardless of type of instruction given. Round your answer to three decimal places. Your Answer Answer Question 8 (2 points) Select all of the following which are appropriate statistics to summarize these data. 211/389-178/389 -0.085 Question 8 (2 points) Select all of the following which are appropriate statistics to summarize these data. 211/389-178/389 = 0.085 389/3031 0.128 (211/1500)/(178/1531) 1.21 211/3031 178/3031 0.011 211/1500-178/1531 = 0.024 Question 9 (2 points) Select all of the following which are appropriate ways to denote the null hypothesis for these data. Question 9 (2 points) Select all of the following which are appropriate ways to denote the null hypothesis for these data. TCC π = 0.5 jt survived πdi Tdied Question 10 (1 point) Which of the following is the appropriate alternative hypothesis? Question 12 (4 points) a) [2 pts] Calculate the null standard error for the difference in sample proportions. Round your answer to three decimal places. b) [2 pts] Use part (a) to calculate the standardized statistic for these data. Round your answer to three decimal places. Question 13 (1 point) Which of the following is the best interpretation of the null standard error for the difference in Usman Haruna: Attempt 1 Question 14 (1 point) Enter the data into the appropriate Theory-Based applet and conduct the hypothesis test. Write your p-value below. Round to 3 decimal places. Your Answer Answer Question 15 (1 point) Which of the following gives the correct formula for calculating standard error of the difference in sample proportions, if you do NOT assume the true proportions are equal. 0x (00131 15 211 1500 78 1531 78 1531 211 1500 1531

Answer 1

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