Q2.1 Hypotheses In a clinical trial to compare the effectiveness of two drugs in preventing heart attacks, 25,620 patients were randomly divided into three groups. One group took a tablet of drug A each day. The next group took a table of drug B each day. The third group took one table of each drug each day. Patients were studied for 56 months and the number of who suffered heart attacks (fatal and non-fatal) were counted. Write the appropriate hypotheses to test if there would be an association between these treatments and cardiac outcome. Save Answer Q2.2 Conditions Values in the table represent counts, (expected values), and [Chi-square components] for this study. Drug A Drug B Both drugs Save Answer Is the sample size of 25,620 large enough? Explain how you know. Q2.3 Mechanics Fatal Heart Attack 598 (607.14) [0.1376] 603 (609.56) [0.0706] 620 (604.30) [0.4079] Drug A Drug B Both drugs Values in the table represent counts, (expected values), and [Chi-square components] for this study. Save Answer Non-Fatal Heart Attack 431 (418.43) [0.3776] 400 (420.10) [0.9617] 424 (416.47) [0.1362] Fatal Heart Attack 598 (607.14) [0.1376] 603 (609.56) [0.0706] 620 (604.30) [0.4079] Q2.4 Decision Linked in Context Non-Fatal Heart Attack 431 (418.43) [0.3776] 400 (420.10) [0.9617] 424 (416.47) [0.1362] No Heart Attack 7513 (7516.43) [0.0016] 7573 (7546.34) [0.0942] 7458 (7481.23) [0.0721] Find the value of Chi-square, the degrees of freedom, and the P-value for this test and list them in the space provided. Based on your results in part (2.3), make a decision linked in context. No Heart Attack 7513 (7516.43) [0.0016] 7573 (7546.34) [0.0942] 7458 (7481.23) [0.0721]

In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 340 trials, the touch therapists were correct 162 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? 0.5 (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.)

In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 310 trials, the touch therapists were correct 149 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.) c. Using Emily's sample results, construct a 95% confidence interval estimate of the proportion of correct responses made by touch therapists. |

In a science fair​ project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left​ hand, and then she asked the therapists to identify the selected hand by placing their hand just under​ Emily's hand without seeing it and without touching it. Among 354 ​trials, the touch therapists were correct 170 times. Complete parts​ (a) through​ (d). a. Given that Emily used a coin toss to select either her right hand or her left​ hand, what proportion of correct responses would be expected if the touch therapists made random​ guesses?     nothing ​(Type an integer or a decimal. Do not​ round.) b. Using​ Emily's sample​ results, what is the best point estimate of the​ therapists' success​ rate?     nothing ​(Round to three decimal places as​ needed.) c. Using​ Emily's sample​ results, construct a 95​% confidence interval estimate of the proportion of correct…