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S-MATH001 Data Analytics for Engineering 2nd Sem SY 2020-2021-CEE14/ESE11 Enabling Assessment on experimental design identification End of quiz You are at the end; press Finished to complete and grade the quiz. You can review your answers below and click Edit if you want to change any. Finished Question 1 A remotivation team in a psychiatric hospital conducted an experiment to compare five methods for remotivating patients. Patients were grouped according to level of initial motivation. Patients in each group were randomly assigned to the five methods. At the end of the experimental period the patients were evaluated by a team composed of a psychiatrist, a psychologist, a nurse, and a social worker, none of whom was aware of the method to which patients had been assigned. The team assigned each  patient a composite score as a measure of his or her level of motivation. The results were as follows:

Do these data provide sufficient evidence to indicate a difference in mean scores among methods? a. What experimental design is most appropriate to use? _____ b. What is factor being considered in the study? _____ c. How many levels are there in the given factor? _____ Response: Randomized block design Response: Remotivation method Response: 5 Question 2 Researchers at a trauma center wished to develop a program to help brain-damaged trauma victims regain an acceptable level of independence. An experiment involving 72 subjects with the same degree of brain damage was conducted. The objective was to compare different combinations of psychiatric treatment and physical therapy. Each subject was assigned to one of 24 different combinations of four types of psychiatric treatment and six physical therapy programs.There were three subjects in each combination. The response variable is the number of months elapsing between initiation of therapy and time at which the patient was able to function independently. The results were as follows: a. What experimental design is most appropriate to use? _____ b. What are the factors considered? _____

c. How many levels are there per factor? _____ d. What is the response variable? _____ Response: axb Factorial Experiment Response: combinations of psychiatric treatment and physical therapy Response: 4 and 6 Response: time until independence Question 3 In a study by Wang et al. (A-6), researchers examined bone strength. They collected 10 cadaveric femurs from subjects in three age groups: young (19–49 years), middle-aged (50–69 years), and elderly (70 years or older) [Note: one value was missing in the middle-aged group]. One of the outcome measures (W ) was the force in newtons required to fracture the bone. The following table shows the data for the three age groups. a. What experimental design is most appropriate to use in the given problem? _____ b. How many levels are there in the given factor? _____ c. What is the response variable of the given problem? _____  Response: Completely randomized design Response: 3 Response: force