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![An experiment was conducted in order to
determine if cerebral blood flow in human
beings can be predicted from arterial oxygen
tension (millimeters of mercury). Fifteen
patients participated in the study, and the
following data were collected:
Blood Flow, Arterial Oxygen
Tension, a
Y
84.33
87.80
82.20
78.21
78.44
80.01
83.53
79.46
75.22
76.58
77.90
78.80
80.67
86.60
78.20
603.40
582.50
556.20
594.60
558.90
575.20
580.10
451.20
404.00
484.00
452.40
448.40
334.80
320.30
350.30
Estimate the "b" in the quadratic regression
equation: y=a+bx+cx². Use 2 decimal places.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F015664c4-c39e-4d70-aa64-69cf00d8022e%2Fe4d00030-8fb4-4332-b7ba-978ba7ae2160%2Fcf66cr8_processed.jpeg&w=3840&q=75)
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- In the experiment, a group of college students was told that they were participating in a manual dexterity study. Half of the students were given a stack of money to count and the other half got a stack of blank pieces of paper. After the counting task, the participants were asked to dip their hands into bowls of very hot water (122°F) and rate how uncomfortable it was. The following data show ratings of pain similar to the results obtained in the study. A. State null and alternative hypotheses b. Report results of statistical test, i.e., significant or not? Use .05 2-tailed alpha level. (what error might you be making) c. Report Cohen’s d value and interpretIn 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 303 trials, the touch therapists were correct 144 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? b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? c. Using Emily's sample results, construct a 90% confidence interval estimate of the proportion of correct responses made by touch therapists. d. What do the results suggest about the ability of touch therapists to select the…A study of the effect of caffeine on muscle metabolism used eighteen male volunteers who each underwent arm exercise tests. Nine of the men were randomly selected to take a capsule containing pure caffeine one hour before the test. The other men received a placebo capsule. During each exercise the subject's respiratory exchange ratio (RER) was measured. (RER is the ratio of CO2 produced to O2 consumed and is an indicator of whether energy is being obtained from carbohydrates or fats). The question of interest to the experimenter was whether, on average, caffeine changes RER. The two populations being compared are “men who have not taken caffeine” and “men who have taken caffeine” the results were as follows: Develop the hypothesis, Do the test Write the result of the hypothesis
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