3. A student at NYU tests positive for Coronavirus. NYU is contact tracing and will quarantine everyone who came into close contact with this student. The following three places have been identified for contact tracing: • The student's dorm. You can call the set of students in the dorm as D. 1 • The student's classroom cohort. You can call the set of students in the cohort as C. • The bus that the student took to school. You can call the set of students in the bus as B. We know the following (all numbers include the student who tested positive): • There are 100 students staying in the dorm. • There are 10 students in the cohort. • There were 8 students in the bus. • There are 2 students from the dorm who are also in the cohort and who took the bus. • There are 3 students from the dorm who are also in the cohort. • There are 2 students from the cohort who took the bus. • There are 4 students from the dorm who took the bus. Find the total number of students (including the student who tested positive) who will be quarantined. 4. Mobile telephones perform handoffs as they move from cell to cell. During a call,
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- There are 100 students staying in the dorm (D). - There are 10 students in the cohort (C). - There were 8 students in the bus (B). Show more…
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Research Methods Assignment Alison is a School Psychologist who is interested in studying the development of working memory in high school students. She decides to study 9th-graders, 10th-graders, and 11th-graders at the high school where she works. She obtains permission from the school administration to conduct the study and she has a meeting with faculty members who teach the students to brief them about the study and answer any questions they might have. Alison writes a grant to fund the study, and she is able to offer a $10 Amazon gift card to each student who participates. Also, each participant will be registered. Alison is allowed to speak to each class, 9th, 10th, and 11th grades, and tell them about the study. Students who decide to participate sign and date the consent form, and their parents sign and date the consent form also. Once Alison collects all of the forms, she finds that 51 9th-graders, 67 10th-graders, and 53 11th-graders have agreed to participate. The study takes the following form: the 9th-graders, 10th-graders, and 11th-graders who participated in the study are given 3 different working memory tests during a class period in February of the school year. Exactly one year later, Alison tests the same participants again. Each participant takes 3 working memory tests. Alison then uses statistical procedures to crunch the numbers and find the results of her research. Based on the information in the scenario above, please answer the following questions: 1. Is Alison using the correlational method or the experimental method? Explain. 2. Is there an Experimental Group? If so, which participants are in that group? 3. Is there a Control Group? If so, which participants are in that group? 4. Is Alison using Random Assignment in this study? Explain. 5. What are some of the possible confounds/third variables that might be affecting this study? In other words, what are some things that might hurt or help the development of working memory that Alison's study is not measuring?
Supreeta N.
1. Andrew believes that the honor roll students at his school have an unfair advantage in being assigned to the math class they request. He asked 500 students at his school the following questions: "Are you on the honor roll?" and "Did you get the math class you requested?" The results are shown in the table below: Help Andrew determine if all students at his school have an equal opportunity to get the math class they requested. Show your work and explain your process for determining the fairness of the class assignment process. 2. A basketball player gets 2 free-throw shots when she is fouled by a player on the opposing team. She misses the first shot 40% of the time. When she misses the first shot, she misses the second shot 5% of the time. What is the probability of missing both free-throw shots? 3. Alan is conducting an experiment to determine whether a new medication is effective in reducing coughing. He finds 2,000 volunteers with coughing issues and divides them into two groups. The control group does not receive any medication; the treatment group receives the medication. The patients in the treatment group show reduced signs of coughing. What can Alan conclude from this experiment? 4. Carlisle is testing different types of planting soil to determine which type is most effective in growing blueberry bushes. He purchases 2 different brands of planting soil from a local store. Carlisle applies Brand A to an area of the yard that receives full sunlight and Brand B to another area of the yard that is in partial shade. He waters both areas daily. At the end of the study, Carlisle concludes Brand A is more effective in growing blueberry bushes. Why is his conclusion not valid? Honor roll Not on honor roll Total Received math class requested 215 125 340 Did not get math class requested 80 80 160 Total 295 205 500
Jerelyn N.
Five of the students were talking about their travel plans. Their names were Albert, Donna, Fred, Sam, and Victoria. They happened to notice that each one was going to a different place and were using a different type of transportation. The places that were to be visited were New York, Miami, Anchorage, Boston, and San Diego. The means of transportation were the family car, a recreational vehicle, a rented van, an airplane, and a cruise ship. Where was each person going, and how were they planning on getting there? The person that was going to New York in a rented van was best friends with Albert and Victoria. The person who was going to Anchorage was not in math class with the person that was traveling by airplane, the person that was going to Miami, nor with Fred or Victoria. The person planning to travel by airplane was not going to Boston; Sam was not going to Boston either. The person going to Miami was on the math team with Albert's sister, who tutored Donna. Donna and Victoria were not going to travel by land. Albert and Fred noticed that their methods of transportation were both two words with the same first letters.
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