Free recall memory strategy. Psychologists who study memory often use a measure of "free recall" (e.g., the number of correctly recalled items in a list of to-be- remembered items). The strategy used to memorize the list-for example, category clustering-is often just as
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- Dr. Moas is interested in examining how environmental cues affect memory. She asks 15 students to study 10 obscure words for a vocabulary exam. All students take the final vocabulary exam in Classroom A. She randomly assigns participants to one of three locations to study for the exam: the same classroom (Classroom A), a different classroom (Classroom B), or a completely separate location, the school gym. Then, she records the number of vocabulary words that each student correctly defines on the exam. The data is as follows: Participant Study Location Vocabulary Words Answered Correctly 1 Same Classroom 9 2 Same Classroom 8 3 Same Classroom 10 4 Same Classroom 8 5 Same Classroom 9 6 Different Classroom 9 7 Different Classroom 8 8 Different Classroom 7 9 Different Classroom 8 10 Different Classroom 7 11 School Gym 6 12 School Gym 7 13 School Gym 5 14 School Gym 6…ANOVA. Dr. Milgramm is conducting a patient satisfaction survey, rating how well her patients like her on a scale of 1-10. Her patients tend to fall into three categories: “Like a lot”, “like somewhat”, and “dislike a lot”. She believes that she might get different satisfaction scores from people in each group, but (because she's not great at numbers) she wants you to do an ANOVA to be sure. She has collected data from 12 patients (three equal groups) with the following results. Group 1) “Like a lot” Mean: 8 SS: 2 N: df: Group 2) “Like somewhat” Mean: 5 SS: 6 N: df: Group 3) “Dislike a lot” Mean: 2 SS: 4 N: df: Grand Mean: df Within-Group:__________ df Between-Groups:___________ Estimated Variance (S21) for Group 1: _______ Estimated Variance (S22) for Group 2: ___________ Estimated…Cognitive psychologists know that memory for the words in the middle of a list is poorer than memory for the words at the beginning or end of the list. Researchers wanted to see if people with different levels of education remember a different number of items in the middle of a list. They selected two groups of people with n=6 in each group. Group 1 has 12 years of formal education and Group 2 has 20 or more years of formal education. The table below shows the number of words each group remembered from the middle 10 words on the list. Group 1 Group 2 4 5 7 7 2 3 4 8 3 6 6 3 a. Is there a significant difference in the number of words remembered from the middle of the list in the two groups? Use an α = .05. b. Compute r2 to measure effect size.
- All Greens is a franchise store that sells house plants and lawn and garden supplies. Although All Greens is a franchise, each store is owned and managed by private individuals. Some friends have asked you to go into business with them to open a new All Greens store in the suburbs of San Diego. The national franchise headquarters sent you the following information at your request. These data are about 27 All Greens stores in California. Each of the 27 stores has been doing very well, and you would like to use the information to help set up your own new store. The variables for which we have data are detailed below. x1 = annual net sales, in thousands of dollarsx2 = number of square feet of floor display in store, in thousands of square feetx3 = value of store inventory, in thousands of dollarsx4 = amount spent on local advertising, in thousands of dollarsx5 = size of sales district, in thousands of familiesx6 = number of competing or similar stores in sales district A sales district…A research study was conducted to examine the clinical efficacy of a new drug used to improve memory. Students were randomly assigned to one of four groups: a placebo group, a group that received a low dose of the drug, and a group that received a moderate dose of the drug, and a group that did not receive any dose. Students were administered their respective doses and had to study for a Spanish vocabulary test. The group who did not receive any drug, was just told to study for the test. None of the 31 students spoke Spanish. Below is an ANOVA table used to analyse the results from the test: Source SS df MS F Between XX XX XX XX Within XX ? XX Total What is the missing value for the degrees of freedom for the "within" row (marked by a ?)? Answer:Help with Q2
- 11A child development specialist is interested in learning if a new learning program increases students’ memory. 15 Subjects learned a list of 50 words. Learning performance was measured using a recall test. Students were initially tested and then tested again after using the new program. Below is the number of words remembered by each student. Student # Score 1 Score 2 1 24 26 2 17 24 3 32 31 4 14 17 5 16 17 6 22 25 7 26 25 8 19 24 9 19 22 10 22…The following tables show the make-up of students in a school's math club. Male Female Totals Freshmen 3 5 8 Sophomores 4 10 Juniors 7 5 12 Seniors 4 10 Totals 20 20 40 P(female I freshman)? 4 20
- Does the background music affect the behavior of supermarket shoppers? An experiment to answer this question was conducted in a supermarket during the relatively stable summer shopping months. Two days were selected in midweek. One day was assigned to receive no background music. During the second day slow-tempo background music was played. The daily sales (in dollars) for twelve weeks are shown in the accompanying table. None Slow tempo $15,172 $15,917 15,485 16,110 13,922 13,818 12,204 14,709 15,501 13,982 14,106 16,416 14,608 14,727 12,946 14,823 15,002 14,825 14,670 15,949 16,202 15,488 13,286 13,055 Estimate the difference in the actual average daily sales between no-music days versus slow-tempo days using a 95% confidence interval. Does the data suggest that, on the average, background music positively affects daily sales? Show all necessary work.A recent study sought to determine if exercising after studying for an exam may help retain information. The 150 student volunteers that participated in the study were randomly assigned to three groups. All students were given a picture memory task that they studied for 15 minutes. After studying, one of the groups was instructed to exercise for 30 minutes immediately after studying. A second group was instructed to wait 1 hour after studying and then exercise for 30 minutes. The third group was instructed to not exercise after studying. The next day all 150 student volunteers were given a test to determine how well they could remember what they studied. Here are the results: The researchers want to test: H0: There is no difference in the distribution of performance on the test for the three treatment groups among the population of all student volunteers like these. Ha: There is a difference in the distribution of performance on the test for the three treatment groups among the…help