![subject](/tpl/images/cats/mat.png)
Mathematics, 26.11.2019 14:31 JayLiz1737
Astudy of telephones and the risk of brain cancer looked at a group of 469 people who have brain cancer. the investigators matched each cancer patient with a person of the same sex, age and race who didn’t have brain cancer, then asked about use of cell phones. this is
a) observational study
b)a matched pair experiment
c)an uncontrolled experiment
d)a randomized comparative study
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:30
Can someone me out here and the tell me the greatest common factor
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 20:20
Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:00
Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y
Answers: 2
![question](/tpl/images/cats/mat.png)
You know the right answer?
Astudy of telephones and the risk of brain cancer looked at a group of 469 people who have brain can...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 01.12.2020 01:00
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 01.12.2020 01:00
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 01.12.2020 01:00
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 01.12.2020 01:00
![question](/tpl/images/cats/fizika.png)
Physics, 01.12.2020 01:00