Explain why it makes sense that the p-value is greater than 0.5 in this situation. d. Is it fair to conclude that you should accept the null hypothesis in this situation?
Practitioners of a controversial medical practice known as therapeutic touch claim that they can man Show more Practitioners of a controversial medical practice known as therapeutic touch claim that they can manipulate a persons human energy field to provide healing powers without actually touching the patients body. Emily Rosa an 11-year-old in Colorado recruited 21 practitioners of therapeutic touch in a study she conducted in 1996 (Rosa et al. 1998). Her study consisted of placing a screen between a subjects eyes and hands. For several trials she hovered her hand over one of theirs flipping a coin each time to decide which hand to hold hers over. She then asked the practitioner to decide which of their hands her hand was near to see whether or not the practitioner could detect Emilys energy field. a. Identify the null and alternative hypotheses in symbols and in words for testing whether or not the subjects could distinguish more often than not over which hand the experimenters hand was held. Also clearly identify the parameter of interest in words. b. Combining the results of the 21 subjects there were a total of 123 correct identifications in 280 repetitions of the experiment. Use these sample data to conduct the test of the hypotheses specified in part a. Report the test statistic and p-value. Round the test statistic to two decimal places and the p-value to four decimal places. z=_____ p -value=_____ c. Explain why it makes sense that the p-value is greater than 0.5 in this situation. d. Is it fair to conclude that you should accept the null hypothesis in this situation? Explain. e. What conclusions do you draw from this study about the effectiveness of therapeutic touch? Show less
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