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…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A clinical psychologist wants to explore a between-subjects experiment comparing treatments for PTSD emotionally focused therapy (EFT), client centered therapy (CCT), cognitive processing therapy (CPT), and cognitive behavioral therapy (CBT) against a control condition. Subjects were randomly assigned to the experimental condition. After 8 weeks, the subject's scores were measured using Treatment Outcome Post-traumatic Stress Disorder Scale (TOP-8). Identify which statistical analysis is appropriate for this data. Identify the IV and DV and their respective levels if applicable. Is this a repeated measures design?
While an independent samples t-test compares two separate groups of people, a paired sample t-test compares the same group of people over time or across two different treatments or events or etc. True False
What is the sample size (n=) and what consequences will the sample size have on my analysis and reporting of results?
In two-way ANOVA, what does it mean when we say that we have balanced data?
Suppose you are a product engineer for a tool manufacturing company, and want to investigate the strength of several new prototype redesigns of one of your drills. You have 15 new drill designs and would like to include a control group also of the original drill design. Your firm has decided to sample 33 drills for each new drill design and 33 drills in the control group with the original drill design. Using this information, you conduct an ANOVA test based on a quantitative measure of the drill's performance, and find that there is a sum of squares between treatments of 2594.0, along with a sum of squares error of 5245.8. Using this information, what was the F-statistic of your analysis? Only round final answer. Round to two decimal places.
12. An investigator reviewed the medical records of 200 children seen for care at Boston Medical Center in the past year who were between the ages 8-12 and identitied 40 with asthma He also identified 40 children of the same ages who were free of asthma Each child and their family were interviewed to assess whether there might be an association between certain environmental factors such as exposure to second hand smoke. This study is an example of a: a. randomized controlled trial b. case-control study c. cohort study d. crossover trial
Only one can be chosen
can someone help with this problem please? Thank you very much!
The basic principles of experimental designs are randomization, replication and error or local control. These principles make a valid test of significance possible. Discuss briefly what makes them indispensable requisite to make field experiments valid?
Suppose you are a product engineer for a tool manufacturing company, and want to investigate the strength of several new prototype redesigns of one of your drills. You have 13 new drill designs and would like to include a control group also of the original drill design. Your firm has decided to sample 37 drills for each new drill design and 37 drills in the control group with the original design. Using this information, if you were to conduct an ANOVA test based on a quantitative measure of the drill's performance, what is the degree of freedom associated with the variation within groups (SSE) in this analysis (denominator degree of freedom)?
A clinical psychologist wants to explore a between-subjects experiment comparing treatments for PTSD emotionally focused therapy (EFT), client centered therapy (CCT), cognitive processing therapy (CPT), and cognitive behavioral therapy (CBT) against a control condition. Subjects were randomly assigned to the experimental condition. After 8 weeks, the subject's scores were measured using Treatment Outcome Post-traumatic Stress Disorder Scale (TOP-8). Identify which statistical analysis is appropriate for this data. Identify the IV and DV and their respective levels if applicable. Is this a repeated measures design?

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