QUESTION 7To test the effectiveness of a new treatment for patients with skin cancer, a randomised controlled trial of the treatment in skin cancer patients isdesigned.What is the purpose of randomisation in this trial?O a Randomisation is unnecessary as the aim is simply to establish correlation, not causationO b. To ensure approximate balance of confounding factors across treatment groupsOcTo prevent patients, doctors and triallists being aware of the treatment each patient receives, which could lead to biasOd To ensure the sample of patients is of sufficient size to estimate the treatment effect with the desired precisionO e To avoid the placebo effecti

Randomization is necessary for these types of tests. So option one is wrong.

Answered: QUESTION 7 To test the effectiveness of…

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?

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Similar questions

What is an experiment?
What is meant by the sample space of an experiment?
How would I want to describe this data study graphically and numerically? What kind of statistical test/method would I want to use and why? A study was performed to determine whether steroids were effective in slowing the development of Crohn’s disease (CD). In the study, 338 patients with irritable bowel syndrome (a possible precursor to CD) were randomly assigned to either receive steroids immediately or to wait until they developed further CD symptoms. Data were collected a year after randomization. In addition to evaluating whether CD developed, data on race, blood tests measurements (continuous), and the number of visits to the doctor in the last year were also collected.
When three groups were compared using the one-way Analysis of Variance (ANOVA), the result turned out to be significant, that is, the null hypothesis was rejected. What will be the appropriate interpretation of this result?A. All three groups significantly differ in means.B. Exactly two of the three groups significantly differ.C. At least two of the three groups significantly differ in means.D. All three groups have the same effect on the dependent variable.
Suppose, when conducting a 2-way ANOVA, you find significant main effects for both of your factors of interest (i.e. gender and educational attainment, categorized as high school graduate or less vs. more than a high school education), but no significant interaction between the 2 factors. Which of the following statements, if any, are reasonable conclusions? Question 22 options: A) Since there is no significant interaction between gender and educational attainment, we can conclude that the outcome does not differ between groups. B) Since there is a significant main effect for gender, then the outcome must be significantly different between males and females. C) Since there is a significant main effect for educational attainment, then the outcome must be significantly different between the 2 educational attainment groups. D) All of the above are reasonable conclusions. E) Answers B and C are reasonable…
Question #10 Please explain The three principles of designing experiments are to control, randomize, and replicate. Which of the following statements is not true about these important principles? Considering (controlling) more variables in planning an experiment helps ensure each study group is similar to the other study groups. Using a control group with a placebo is important since otherwise folks in the control group may behave differently than those in the treatment group. Randomizing individuals into groups is one component to prevent accidental bias from creeping into a study. We can always generalize the result of a study to the greater population so long as we randomize which patients go into which study groups. Studying many cases (e.g. including many patients in a study) is often more helpful than just including a few cases in the study. If we collect more information on each case (e.g. take repeated measurements on each individual) that might be helpful to obtaining more…

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