Retrospective-prospective and randomized experiments

Reference no: EM13525852

To discover whether HIV is transmitted by sexual intercourse the experimental method least likely to be used, because it would raise ethical concerns is: (a) retrospective experiments. (b) prospective experiments. (c) randomized experiments.

Reference no: EM13525852

Questions Cloud

Smoke is causally linked to lung diseases : To find out if second hand smoke is causally linked to lung diseases, the quickest way to get significant results would require using: (b) retrospective experiments. (b) prospective experiments. (c) randomized experiments.

Find how long is the ball in air before it hits the ground : A student standing on the ground throws a ball straight up. How long is the ball in the air before it hits the ground

Compute the ph of the solution after the base added : A 20.0 mL sample of 0.200 M HBr solution is titrated with 0.200 M NaOH solution. Calculate the pH of the solution after the following volumes of base have been added.

Find does the driver beat this time : At a sports car rally, a car starting from rest accelerates uniformly at a rate of 9.0 m/s^2 over a straight-line distance of 100 m. Does the driver beat this time

Retrospective-prospective and randomized experiments : To discover whether HIV is transmitted by sexual intercourse the experimental method least likely to be used, because it would raise ethical concerns is: (a) retrospective experiments. (b) prospective experiments. (c) randomized experiments.

What potential difference must be applied to the spark plug : A spark plug in a car has electrodes separated by a gap of 6.5×10?2in. What potential difference must be applied to the spark plug to initiate a spark

Define what is the concentration of oh- in the solution : When Zn(OH)2(s) was added to 1.00 L of a basic solution, 1.30*10^-2 mol of the solid dissolved. What is the concentration of OH- in the final solution

How much power is dissipated at half the maximum voltage : What is the safe operating voltage for a 100 Ohm, 1/10W resistor? The maximum current? How much power is dissipated at half the maximum voltage

Explains its observations-uses ad hoc explanation : There are a number of documented cases of human remains being found where the central portion of the body—even the bones--are burned to ashes, while the legs and surrounding area (the house or woods) is not burned. Typically the body will be almos..

User Account

All Pages