Tom Rogars wantod to test a new \"singalong\" mcthod to teach math to fourth gra
ID: 3445750 • Letter: T
Question
Tom Rogars wantod to test a new "singalong" mcthod to teach math to fourth graders (cg. "l love to multiply to the tune of "God Bless America . He used the singaong method in his first period class. His sixth period students continued solving math problems with the old method At the end of the term, Mr. Rogers Sound that the first period class scorod significantly low er than the sixth period class on a mathematics achievement test. He concluded that the singalong method was a total failure I. Identify the independent variable(s). 2 Identify the dependent variablets) 3. Identify any confounding variable(s). 4. Propose a method to "unconfound" the experiment Ceafound selection 2 An airport administrator investigated the attention spans of air traffic controllers to determine how many incoming flights the average conetroller can coondinate at the same time. Each randomly selected controller was tested, without his or her knowledge, by a computer peogram that fed talse flight information to a computer teminal. The controller first "received" information feom one plane, and by the end of an hour the controller was coordinating 10 planes simultaneously The administrator analyzed the emoes collected by the computer program. The analysis revealed that the maximum number of planes controller could handle without making potentially fatal errors was six planes. Also, no crrors eccurrod whem only one to three planes were incoming, He concluded that a controller should never cooedinate more than six incoming flights. Ceafound selection 3 A drug oompany developed a new medication to control the manic phase of bipolar manic-depression. The firm hired a hospital psychiatrist to test the effectiveness of the drug. He identified a group of manic-depressive patients and randomly assigned them to a drag or placeho grosup Nurse Ratched was told to administer the drug and Nurnse Johnson was told to administer the placebo. Each nurse made daily observations of her patients during treatment. A month later the observatioes were compared. In general, patients in the drug group had behaved more "normally tham patients in the placebo group. The drug company publicized its product's effectiveness Ceafound selection 4 Dr. Goodrich wantod to demonstrale that his tires were better than those of his competisor, Dr. Goodyear. From car segisteatice and leasing recoeds, he Sound 40 salespeople who drove the same model of automobile approximately the same number of miles per week. Anonymously, Dr. Goodrich hired an independent research assistant who was unaware of the purpose of the study, to randomly assign to 20 of the salespoople a new sct of unmarked Goodrich tires, and to the other 20 a new sct of unmarked Goodycar tires of the same price and quality. Aftler six months and an avcrape of 15,000 miles traveled by both groups, the assistant arangod for the salespeople to exchange tires. After another six months, and similar mileagethe assistant measured the amount of tread wear and reported that the Goodrich tires had actually worn more than the Goodycar tires Ceafound selection 5 An investigatoe was interested in studying the effect of taking a course in child development upon anitudes toward childrearing. At the end of the semester, the researcher distributed a questionnaire to students who had taken the child development course. Questicenaires were also given to an equal number of stadents who had not taken the course. The students who had taken the child development course had different attitades from the students who had mot takem the course (cg they had more positiveExplanation / Answer
Dear Student , its my request to you that from the next time please give questionaires after increasing the size of the letter , because its too difficult to read thae matters clearly. Anyhow answer is under:
Confounding variable is omething inbetween the independent variable and dependent variable. Confounding variable corelates with both the other variables.
As per the cases you have shared , in all the cases except CASE 2, confounding variables are strongly present because several factors are there which will disrupt the results ofthe research.
In CASE 2 , confounding variable is either zero or very very less as we can measure span of attention very clearly and randomisation with matching effects will diminise the chance of the stud result from being confound.