1) Dr. Muzak believes that students will learn most effectively with a constant
ID: 3059105 • Letter: 1
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1) Dr. Muzak believes that students will learn most effectively with a constant background sound, as opposed to an unpredictable sound or no sound at all. She randomly assigns 30 students to one of three groups (10 per group). All students study a passage of text for 30 minutes. Those in group 1 study with sound at a constant volume in the background. Those in group 2 study with sound that changes volume periodically. Those in group 3 study with no sound at all. Al students then take a 10-question multiple choice test based on the passage they studied. ed a. What is the sample? b. What is the independent variable and the levels of that independent variable? c, what is the null hypothesis? (written using parameters) d. What is the alternative hypothesis? (written using parameters)Explanation / Answer
1) Dr. Muzak believes that students will learn most effectively with a constant background sound, as opposed to an unpredictable sound or no sound at all. She randomly assigns 30 students to one of three groups (10 per group). All students study a passage of text for 30 minutes. Those in group 1 study with sound at a constant volume in the background. Those in group 2 study with sound that changes volume periodically. Those in group 3 study with no sound at all. Al students then take a 10-question multiple choice test based on the passage they studied. ed a. What is the sample? b. What is the independent variable and the levels of that independent variable? c, what is the null hypothesis? (written using parameters) d. What is the alternative hypothesis? (written using parameters)
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