To gauge whether animal-assisted therapy can improve the physiological responses of heart failure patients, a sample of n=26 heart failure patients was visited by a human volunteer accompanied by a trained dog; the anxiety level of each patient was measured (in points) both before and after the visits. The drop (before - after) in anxiety level for patients us summarized as follows: bar{X}_d: sample mean differences = 10.5 s_d: standard deviation of differences = 7.6 Does animal assisted therapy significantly reduces the mean anxiety level of heart failure patients? Support your answer with a 95% confidence interval. Group of answer choices Since the 95% CI is (-7.43, 13.57), we are 95% confidencet to say that animal assisted therapy significantly cannot reduces the mean anxiety level of heart failure patients. Since the 95% CI is (-7.43, 13.57), we are 95% confidencet to say that animal assisted therapy significantly reduces the mean anxiety level of heart failure patients. Since the 95% CI is (7.43, 13.57), we are 95% confidencet to say that animal assisted therapy significantly cannot reduces the mean anxiety level of heart failure patients. Since the 95% CI is (7.43, 13.57), we are 95% confidencet to say that animal assisted therapy significantly reduces the mean anxiety level of heart failure patients.
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
To gauge whether animal-assisted therapy can improve the physiological responses of heart failure patients, a sample of n=26 heart failure patients was visited by a human volunteer accompanied by a trained dog; the anxiety level of each patient was measured (in points) both before and after the visits. The drop (before - after) in anxiety level for patients us summarized as follows:
bar{X}_d: sample mean differences = 10.5
s_d: standard deviation of differences = 7.6
Does animal assisted therapy significantly reduces the mean anxiety level of heart failure patients? Support your answer with a 95% confidence interval.
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