![subject](/tpl/images/cats/fizika.png)
Suppose a study is proposed to compare a renovascular procedure versus medical therapy in lowering the systolic blood pressure of patients with hypertension secondary to renal artery stenosis. on the basis of results of preliminary studies, the investigators estimate that the vascular procedure may lower blood pressure by 20 mm hg, while medical therapy may lower blood pressure by only 10 mm hg. on the basis of results of preliminary studies, the sd for blood pressure lowering is estimated to be 15 mm hg. a significance criterion of 0 .05 and power of 0.80 are chosen. if they want to do a two-sided test of equal population means with α= 0.05 and β= 0.20, what sample size should they use?
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Physics
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 13:50
The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 16:00
In which of the following is positive work done by a person on a suitcase
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:30
In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.
Answers: 2
You know the right answer?
Suppose a study is proposed to compare a renovascular procedure versus medical therapy in lowering t...
Questions
![question](/tpl/images/cats/biologiya.png)
Biology, 17.07.2019 01:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/istoriya.png)
History, 17.07.2019 01:30
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)
History, 17.07.2019 01:30
![question](/tpl/images/cats/himiya.png)
Chemistry, 17.07.2019 01:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.07.2019 01:30
![question](/tpl/images/cats/fizika.png)
Physics, 17.07.2019 01:30
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/fizika.png)
Physics, 17.07.2019 01:30
![question](/tpl/images/cats/fizika.png)
Physics, 17.07.2019 01:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.07.2019 01:30
![question](/tpl/images/cats/en.png)
English, 17.07.2019 01:30