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A study of treatments for angina (pain due to low blood supply to the heart) compared bypass surgery, angioplasty, and use of drugs. The study looked at the medical records of thousands of angina patients whose doctors had chosen one of these treatments. It found that the average survival time of patients given drugs was the highest. Is it reasonable to conclude that using these dugs will prolong life for angina patients more than the other treatments will? Yes, this study provides convincing evidence that these drugs prolong life and should be the treatment of choice. No, we can't conclude that these drugs prolong life becasue the patients were volunteers. No, we can't conclude that these drugs prolong life because the groups might differ in ways besides the treatment. ) No, we can't conclude that these drugs prolong life because no placebo was used. me studies of the relationship between car color and frequency of accidents have found that red cars are pre likely to be in accidents than black bars, depsite how visible they are. Some experts warn that we ould not conclude red cars are less safe than black cars because of possible confounding. which of the lowing best describes what this means? There are too many variables involved in traffic accidents to isolate the effect of car cołor. The accidents used in the study might not be a random sample of all accidents. It is possible to separate the effect of car color from the type of people who choose to drive red cars. It can be hard to determine if red cars or black cars are more visible on modern highways.

A study of treatments for angina (pain due to low blood supply to the heart) compared bypass surgery, angioplasty, and use of drugs. The study looked at the medical records of thousands of angina patients whose doctors had chosen one of these treatments. It found that the average survival time of patients given drugs was the highest. Is it reasonable to conclude that using these dugs will prolong life for angina patients more than the other treatments will? Yes, this study provides convincing evidence that these drugs prolong life and should be the treatment of choice. No, we can't conclude that these drugs prolong life becasue the patients were volunteers. No, we can't conclude that these drugs prolong life because the groups might differ in ways besides the treatment. ) No, we can't conclude that these drugs prolong life because no placebo was used. me studies of the relationship between car color and frequency of accidents have found that red cars are pre likely to be in accidents than black bars, depsite how visible they are. Some experts warn that we ould not conclude red cars are less safe than black cars because of possible confounding. which of the lowing best describes what this means? There are too many variables involved in traffic accidents to isolate the effect of car cołor. The accidents used in the study might not be a random sample of all accidents. It is possible to separate the effect of car color from the type of people who choose to drive red cars. It can be hard to determine if red cars or black cars are more visible on modern highways.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A study of treatments for angina (pain due to low blood supply to the heart) compared bypass surgery, angioplasty, and use of drugs. The study looked at the medical records of thousands of angina patients whose doctors had chosen one of these treatments. It found that the average survival time of patients given 1 drugs was the highest. Is it reasonable to conclude that using these dugs will prolong life for angina patients more than the other treatments will? Yes, this study provides convincing evidence that these drugs prolong life and should be the treatment of choice. No, we can't conclude that these drugs prolong life becasue the patients were volunteers. No, we can't conclude that these drugs prolong life because the groups might differ in ways besides the treatment. No, we can't conclude that these drugs prolong life because no placebo was used. Some studies of the relationship between car color and frequency of accidents have found that red cars are more likely to be in accidents than black bars, depsite how visible they are. Some experts warn that we 1 should not conclude red cars are less safe than black cars because of possible confounding. which of the following best describes what this means? There are too many variables involved in traffic accidents to isolate the effect of car color. O The accidents used in the study might not be a random sample of all accidents. O It is possible to separate the effect of car color from the type of people who choose to drive red cars. It can be hard to determine if red cars or black cars are more visible on modern highways..
Transcribed Image Text:A study of treatments for angina (pain due to low blood supply to the heart) compared bypass surgery, angioplasty, and use of drugs. The study looked at the medical records of thousands of angina patients whose doctors had chosen one of these treatments. It found that the average survival time of patients given 1 drugs was the highest. Is it reasonable to conclude that using these dugs will prolong life for angina patients more than the other treatments will? Yes, this study provides convincing evidence that these drugs prolong life and should be the treatment of choice. No, we can't conclude that these drugs prolong life becasue the patients were volunteers. No, we can't conclude that these drugs prolong life because the groups might differ in ways besides the treatment. No, we can't conclude that these drugs prolong life because no placebo was used. Some studies of the relationship between car color and frequency of accidents have found that red cars are more likely to be in accidents than black bars, depsite how visible they are. Some experts warn that we 1 should not conclude red cars are less safe than black cars because of possible confounding. which of the following best describes what this means? There are too many variables involved in traffic accidents to isolate the effect of car color. O The accidents used in the study might not be a random sample of all accidents. O It is possible to separate the effect of car color from the type of people who choose to drive red cars. It can be hard to determine if red cars or black cars are more visible on modern highways..
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