**Randomized Controlled Trials**A randomized controlled trial (RCT) is a powerful research method used to assess the effectiveness of interventions. In designing and analyzing RCTs, several factors contribute to the validity and reliability of the results. ### Favorable Practices in RCTsConsider the following factors to determine which is favorable in a randomized controlled trial:- **A. Use of competing interventions within a trial:** Introducing multiple interventions within the same trial for comparison. - **B. Performing ad hoc analyses to support desired findings:** Conducting non-preplanned analyses to achieve specific outcomes, which can introduce bias. - **C. Assessment of outcomes by various manners for different interventions:** Evaluating results through diverse methods for each intervention can help ensure comprehensive understanding, though consistency is crucial for validity. - **D. Statistical power of at least 80%:** Ensuring adequate statistical power increases the likelihood of detecting a true effect when it exists, thus enhancing the credibility of the trial's results.**Preferred Practice:**- **D. Statistical power of at least 80%** is generally considered favorable as it indicates a high probability of correctly rejecting a false null hypothesis, thereby strengthening the findings of the trial.

RCTs are considered the gold standard for checking the effectiveness of medical treatments and…

Answered: Which of the following is favorable in…

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 new treatment is developed that prevents death but does not produce recovery from disease. Which of the following will occur? [2 O Prevalence will decrease O Incidence will decrease O Incidence will increase O Prevalence will increase The most valid study design to determine causation between a risk factor (exposure) and a certain outcome is: Randomized Clinical trial O Retrospective cohort O Cross sectional O Prospective cohort
Is there a difference among the 3 treatments in the table below? Test using α = .05 Complete the ANOVA table that follows as an aid (Recommend doing so on a separate sheet of paper, or separate document), then answer the questions that follow. Treatment A Treatment B Treatment C 2 3 2 ∑X2 = 280 2 3 4 G = 60 3 4 5 N = 15 3 5 6 k = 3 5 5 8 SS1 = 6 SS2 = 4 SS3 = 20 Source Sums of Squares df Mean Square FBetween SSbn dfbn MSbn FWithin SSwn dfwn MSwn Total SStot SStot =______ SSwn = ______ SSbn = ______
A single factor experiment is conducted in which the factor is varied over 3 levels. Treatment averages are calculated as y1. = 29.75, ỹ2. = 36.75, y3, = 46.25 and the ANOVA table obtained is given below. %3D %3! Source DF S MS F P 2 450.7 225.3 7.04 32.0 Factor 0.014 9 288.3 738.9 Error Total 11 5.659 R-Sq - 60.998 R-Sq (adj) = 52.32% %3D a) Use Fisher's least significant difference to make comparisons between all pairs of means at experiment- wise error rate a = 0.05. State your conclusions. b) Use Tukey's test to make comparisons between all pairs of means at experiment-wise error rate a = 0.05. State your conclusions.
Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (xx) Cost(yy) 957 148.98 624 100.36 869 137.66 281 40.34 259 39.26 579 82.06 309 52.26 485 83.9 797 113.58 338 54.32 911 138.54 A student calculates a linear modelyy = xx + . (Please show your answers to two decimal places)Use the model to estimate the cost when number of pages is 200.Cost = $ (Please show your answer to 2 decimal places.)
(The output processed data is in the picture below) A company has four branch offices. At each branch office, the research was carried out using a random sample, then the data was processed using ANOVA with the following results: Based on the results of data processing, answer the following questions: a. What is the number of samples (N) used in the study?b. State the value for F-countc. Using the significance level or the Alpha (α) value 4%, test the hypotheses in the study and provide the conclusion.d. How do you think the conclusions of the research are?
Consider the ANOVA table shown here for a one-way analysis of variance for an experimental design in which there are four treatment levels: Source Between Error Total Df 29 SS 485.50 715.50 The observed F value is ____. MS F
Use formulas to solve this and also with explaination
Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages (xx) Cost(yy) 942 59.1 453 24.65 789 41.45 473 34.65 302 25.1 567 23.35 482 32.1 511 26.55 285 28.25 529 35.45 477 19.85 Click to Copy-and-Paste DataA student calculates a linear modelyy = xx + . (Please show your answers to two decimal places)Use the model above to estimate the cost when the number of pages is 736Cost = $ (Please show your answer to 2 decimal places.)
The ANOVA table of the above data is as follows: ANOVA Source of Variation SS df MS 2.083 P-value Factor A J 1 0.725 Marketing startegies 0.750 1 0.750 0.832 Interaction 90.750 K 90.750 0.043 Within 125.333 15.667 Total 218.917 10. Calculate J and L 11. State HO and H1 hypotheses of interaction effect based on the above problem. 12. At a = 0.1, is there any significant effect? What is your decision? Support your answer. 13. What is your conclusion?
Data from a completely randomized experimental design with three treatments is given below
Consider the ANOVA table shown here for a one-way analysis of variance for an experimental design in which there are four treatment levels: Source Between Error Total Df 29 SS 485.50 715.50 MS F For a 5% level of significance, the critical F value is

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Which of the following is favorable in a randomized controlled trial? OA. Use of competing interventions within a trial OB. Performing ad hoc analyses to support desired findings OC. Assessment of outcomes by various manners for different interventions D. Statistical power of at least 80%