00 compute the of error of a 95% for the difference 17.16 A bionic A tested the of a for in the back of the book or the on 4 a for is You may want to is from either C (c) The value for a 95% level under the t(10) distribution (b) the 11 in (off minus on), then ABOUT A POPULATION MEAN RR Paired t-test data: ACT$ACT.off and ACT$ACT.on 95 percent confidence interval: nselb 0.8176327 1.3278218 sample estimates: mean of the differences 1.072727 LEGO patients diagnosed with essential tremor. Here is the tremor amplitude measured (in centimeters) with a precision accelerometer for each of 11 subjects when per- forming a spoon-use task with the ACT device turned, in random order, once on and once off. Subject 1 2 3 4 1 5 9 10 11 2 1 1.7 1.9 0.8 1.7 1.6 0.5 14 6 7 ACT off 1.2 1.6 0.3 0.2 0.6 0.2 0.5 0.4 0.2 0.6 0.3 0.2 0.1 (a) Figure 17.9 shows the R output for the 95% confidence interval for the mean difference in tremor amplitude based on these data. Interpret this confidence interval in context. (b) Compute the 11 paired differences in tremor amplitude (off minus on/, obtain their mean and standard deviation. a. is 2.228. You may want to verify that this value is correct from either Tab 422, compute the margin of error of a 95% confidence interval for the mean duie che in tremor amplitude. Verify that the resulting confidence interval agrees wie andıno y 17.16 A bionic pancreas. A study tested the effectiveness of a dinbetes. In ran- BMIS hypocaloric diet and pre-meal water intake significantly lowers BMI. and 29.5, respectively. Explain briefly why matched pairs procedure must be used to assess whether the combination of a hypocaloric diet and pre-meal water intake significantly lowers BMI. (6) The 25 patients assigned to the nonwater group had mean BMIS before and ofrer the 12-week diet of 31.8 and 29.9, respectively. Explain briefly why we cannot use a matched pairs procedure to test the hypothesis that the combination of a hypocaloric diet and pre-meal water intake is significantly more effective than a hypocaloric diet alone in lowering BMI. 17 15 Essential tremor. Essential tremor is a neurological movement disorder char- acterized by involuntary rhythmic movement that typically interferes with the full use of the arms and hands. Example 7.8 (page 175) described a pilot experi- ment examining the effectiveness of a noninvasive handheld device using active cancellation of tremor (ACT) technology to stabilize tremor-induced motion in