This topic contains a solution. Click here to go to the answer

Author Question: In a study of patients who had a heart attack, 3630 patients were randomly assigned to receive one ... (Read 162 times)

lbcchick

  • Hero Member
  • *****
  • Posts: 550
In a study of patients who had a heart attack, 3630 patients were randomly assigned to receive one of three treatments: aspirin alone, warfarin alone, or aspirin plus warfarin. The results showed that 20.0 of the aspirin group had another heart attack, stroke, or died, compared with 16.7 of the warfarin group and 15.0 of the aspirin plus warfarin group. The difference between the aspirin and warfarin groups was statistically significant, while the difference between the warfarin and aspirin plus warfarin group was not statistically significant. The statistically significant difference between the aspirin group (20.0) and the warfarin group (16.7) means that
 a. the difference between the two rates, 20.0 and 16.7, is unlikely to have resulted from two groups whose true rates of heart attack, stroke, or death were identical.
  b. the difference between the two rates, 20.0 and 16.7, is likely to have resulted from two groups whose true rates were identical.
  c. the difference between the two rates, 20.0 and 16.7, is likely to have resulted from the difference in sample sizes between the two groups.
  d. the difference in the two rates, 20.0 and 16.7, is likely to have resulted from other factors, such as age and gender, on which the two groups differed.

Question 2

In a study of advanced colorectal cancer, 100 patients were randomly assigned to receive either a high dose of Vitamin C or placebo. The study concluded that Vitamin C was not effective in the treatment of advanced colorectal cancer because none of the patients with disease showed any improvement in the two groups. The cause and effect conclusion
 a. might be justified because randomization was used.
  b. cannot be justified because anecdotal evidence from other patients not in the study, shows that some people who take Vitamin C do recover from their disease.
  c. cannot be justified because there could have been other systematic differences between the two treatment groups, such as age and gender, so that the two groups cannot be compared to each other.
  d. could be justified because the sample size was fairly large (100 patients).



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Pariscourtney

  • Sr. Member
  • ****
  • Posts: 352
Answer to Question 1

A

Answer to Question 2

A




lbcchick

  • Member
  • Posts: 550
Reply 2 on: Jul 24, 2018
Wow, this really help


gcook

  • Member
  • Posts: 343
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

For a complete list of videos, visit our video library