test the claim that student-centered model results in a higher pass rate than the traditional model?
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In many colleges, educators are changing their approach to instruction from a “teacher/lecture-centered
model” to a “student-centered model” where students learn in a laboratory environment in which lecture
is deemphasized and students can proceed at a pace suitable to their learning needs. In once school
where this model was being introduced, of the 743 students who enrolled in the traditional lecture
model, 364 passed; of the 567 in the student-centered model, 335 passed. Use a 0.05 level of
significance to test the claim that student-centered model results in a higher pass rate than the traditional
model?
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- Which model—the one for parliaments or the one for ministries (or cabinets)—presented in the article has the greater explanatory power? How can you tell?University students are increasingly taking class notes on a laptop rather than writing their notes by hand. Students argue that laptops are more efficient, but professors typically disagree. Which method is better for developing conceptual understanding? In an experiment, 109 university students all watched the same lecture. Half were randomly assigned to take notes on a laptop while the remaining students took notes by hand. Before taking a test to measure conceptual understanding of the lecture, researchers assigned half of each group to review their notes while the other half wasn’t given an opportunity to review. List the explanatory variables and the number of possible values for each variable.University students are increasingly taking class notes on a laptop rather than writing their notes by hand. Students argue that laptops are more efficient, but professors typically disagree. Which method is better for developing conceptual understanding? In an experiment, 109 university students all watched the same lecture. Half were randomly assigned to take notes on a laptop while the remaining students took notes by hand. Before taking a test to measure conceptual understanding of the lecture, researchers assigned half of each group to review their notes while the other half wasn’t given an opportunity to review. List the explanatory variables and the number of possible values for each variable. If the researchers used every possible combination to form the treatments, how many treatments were included in the experiment? 2. List two of the treatments. 3. Were the subjects (the students) “blind” to what treatment they received? 4.What is the response variable?
- Large companies typically collect volumes of data before designing a product, not only to gain information as to whether the product should be released, but also to pinpoint which markets would be the best targets for the product. Several months ago, I was interviewed by such a company while shopping at a mall. I was asked about my exercise habits and whether or not I'd be interested in buying a video/DVD designed to teach stretching exercises. I fall into the male, 18 - 35-years-old category, and I guessed that, like me, many males in that category would not be interested in a stretching video. My friend Holly falls in the female, older-than-35 category, and I was thinking that she might like the stretching video. After being interviewed, I looked at the interviewer's results. Of the 94 people in my market category who had been interviewed, 14 said they would buy the product, and of the 108 people in Holly's market category, 34 said they would buy it. Assuming that these data came…Large companies typically collect volumes of data before designing a product, not only to gain information as to whether the product should be released, but also to pinpoint which markets would be the best targets for the product. Several months ago, I was interviewed by such a company while shopping at a mall. I was asked about my exercise habits and whether or not I'd be interested in buying a video/DVD designed to teach stretching exercises. I fall into the male, 18-35-years-old category, and I guessed that, like me, many males in that category would not be interested in a stretching video. My friend Holly falls in the female, older-than-35 category, and I was thinking that she might like the stretching video. After being interviewed, I looked at the interviewer's results. Of the 89 people in my market category who had been interviewed, 20 said they would buy the product, and of the 103 people in Holly's market category, 28 said they would buy it. Assuming that these…Large companies typically collect volumes of data before designing a product, not only to gain information as to whether the product should be released, but also to pinpoint which markets would be the best targets for the product. Several months ago, I was interviewed by such a company while shopping at a mall. I was asked about my exercise habits and whether or not I'd be interested in buying a video/DVD designed to teach stretching exercises. I fall into the male, 18 35-years-old category, and I guessed that, like me, many males in that category would not be interested in a stretching video. My friend Jenny falls in the female, older-than-35 category, and I was thinking that she might like the stretching video. After being interviewed, I looked at the interviewer's results. Of the 97 people in my market category who had been interviewed, 12 said they would buy the product, and of the 116 people in Jenny's market category, 31 said they would buy it. Assuming that these data eame from…
- In a classic study, Shrauger (1972) examined the effect of an audience on performance for two groups of participants: high self-esteem and low self-esteem individuals. The participants in the study were given a problem-solving task with half of the individuals in each group working alone and half working with an audience. Performance on the problem-solving task was measured for each individual. The results showed that the presence of an audience had little effect on high self-esteem participants but significantly lowered the performance for the low self-esteem participants. a. How many factors does this study have? What are they? b. Describe this study using the notation system that indicates factors and numbers of levels of each factor. c. Was there a significant interaction? Describe it.In a classic study, Shrauger (1972) examined the effect of an audience on performance for two groups of participants: high self-esteem and low self-esteem individuals. The participants in the study were given a problem-solving task with half of the individuals in each group working alone and a half working with an audience. Performance on the problem-solving task was measured for each individual. The results showed that the presence of an audience had little effect on high self-esteem participants but significantly lowered the performance for the low self-esteem participants. a. How many factors does this study have? What are they? b. Describe this study using the notation system that indicates factors and numbers of levels of each factor.A campus researcher wanted to investigate the factors that affect visitor travel time in a complex, multilevel building on campus. Specifically, he wanted to determine whether different building signs (building maps versus wall signage) affect the total amount of time visitors require to reach their destination and whether that time depends on whether the starting location is inside or outside the building. Three subjects were assigned to each of the combinations of signs and starting locations, and travel time in seconds from beginning to destination was recorded. How should the data be analyzed? Wall Signs Map Starting Room Interior 141, 119, 238 85, 94, 126 Randomized block design O Completely randomized design 2 x 2 factorial design Levene's test Exterior 224, 339, 139 226, 129, 130
- A Professor offered a course that was delivered half online and half in-person (e.g., 1 week online and 1 week in-person). The Professor hypothesized that students were spending less time engaged with course material during online weeks compared to in-person weeks. At the end of the semester, students were asked to provide the amount of time they tended to course tasks in a week. Tasks included doing course readings, preparing lecture material, and doing weekly assignments. The weeks were classified as online or in-person and the average amount of time (rounded to the nearest hour) spent engaged with course material is provided for 15 students in the course. Online 4 3 6 2 2 4 7 4 3 2 6 3 In-person 7 4 4 6 4 3 4 Test the hypothesis at the 5% significance level (a = 0.05) using the 5-step hypothesis testing procedure (show ALL steps). Make sure to clearly state the null and alternative hypotheses in formal notation. Round all values to 2 decimal places. Show your work. Take a picture of…As you read about each study, (a) classify the type of research that it reflects, and (b) identify the kinds of conclusions that might reasonably be drawn from the results. The director of computer technology in Emerson School District wants to gather information about the use of technology-based instruction in language arts and literature classes in the district's middle schools and high schools. For her study, the director identifies five of the top teachers in these content areas. She visits and observes each teacher's classes on three different days and subsequently interviews each teacher. Then she summarizes the ways that these teachers incorporate the use of technology into their lessons and their students' activities. The director also summarizes teachers' beliefs about the roles of technology in students' learning and motivation. (a) Classify the research as one of the following: Quantitative/descriptive Quantitative/correlational…Many animals, including humans, tend to avoid directeye contact and even patterns that look like eyes.Some insects, including moths, have evolved eye-spotpatterns on their wings to help ward off predators.Scaife (1976) reports a study examining how eye-spotpatterns affect the behavior of birds. In the study, thebirds were tested in a box with two chambers andwere free to move from one chamber to another. Inone chamber, two large eye-spots were painted onone wall. The other chamber had plain walls. Theresearcher recorded the amount of time each birdspent in the plain chamber during a 60-minute session.Suppose the study produced a mean of M = 34.5 minutes on the plain chamber with SS = 210 for a sample of n = 15 birds. (Note: If the eye spots have no effect,then the birds should spend an average of μ = 30minutes in each chamber.)a. Is this sample sufficient to conclude that the eyespots have a significant influence on the birds’behavior? Use a two-tailed test with α = .05.b. Compute the…