In a double-blind experiment designed to test the effectiveness of a new medication as a treatment for lower back pain, 1643 patients were randomly assigned to one of three groups: (1) the 547 subjects in the placebo group were given pills containing no medication; (2) 550 subjects were in a group given pills with the new medication taken at regular intervals; (3) 546 subjects were in a group given pills with the new medication to be taken when needed for pain relief. What does it mean to say that the experiment was "double-blind"? Choose the correct answer below. O A. Both the subjects in the study and those who administered the pills knew whether they were taking a placebo or the new medication. O B. The subjects in the study did not know whether they were taking a placebo or the new medication, and those who administered the pills also did not know. O C. The subjects in the study were given the choice of taking the placebo or the new medication, but those who administered the pills did not know which group the subjects were in. O D. The subjects in the study did not know whether they were taking a placebo or the new medication, but those who administered the pills did know.

In a double-blind experiment designed to test the effectiveness of a new medication as a treatment for lower back pain, 1643 patients were randomly assigned to one of three groups: (1) the 547 subjects in the placebo group were given pills containing no medication; (2) 550 subjects were in a group given pills with the new medication taken at regular intervals; (3) 546 subjects were in a group given pills with the new medication to be taken when needed for pain relief. What does it mean to say that the experiment was "double-blind"? Choose the correct answer below. O A. Both the subjects in the study and those who administered the pills knew whether they were taking a placebo or the new medication. O B. The subjects in the study did not know whether they were taking a placebo or the new medication, and those who administered the pills also did not know. O C. The subjects in the study were given the choice of taking the placebo or the new medication, but those who administered the pills did not know which group the subjects were in. O D. The subjects in the study did not know whether they were taking a placebo or the new medication, but those who administered the pills did know.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Trying to find out Which score is better, a 75 on History or Score of 27 on Psychology
How do you do a spearman’s test ranking
The low temperatures in the Town of Rigby for 5 conservative days were -12, -17,-11,-12,-18 what was the mean low temperature for five days
A survey found that 31% of Americans watch the fireworks on the 4th of July from their TV. If 20 Americans are surveyed, would it be unusual to have less than 8 watch the fireworks from their TV? Explain.
How can p<.05 be interpreted
But can't be expressed as { } 16. Teresa has been saving dimes and nickels. She has three times as many nickels as dimes and has at least 48 coins. What is the smallest number of nickels she might have? 17. You are taking a literature course in which there will be 5 tests, each worth 100 points. You have scores of 94, 90, and 89 on the first three tests. You must make a total of at least 450 in order to get an A. What scores of the fourth test will keep you eligible for an A? medical bills and 20% of all bills after that. Under plan B, Giselle would pay the first $250 of bills, but only 10% of the rest. For what amount of medical bills will plan B save Giselle money? (assume that her bills will exceed $250) 18. Bayside Insurance offers two plans. Under plan A, Giselle would pay the first $50 of her