Using the Shapley-Shubik method, is it possible for a dummy to be pivotal?
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Using the Shapley-Shubik method, is it possible for a dummy to be pivotal?
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- Hello. Could anyone help me on this question? I have tried it four times and only one attempt left. What I am confusing is that some choice are not individual and variables. Like all young children, children who eat snack and cartoon characters. But if i leave them there, it shows me I am wrong. Pls help me on this and explanation would be appreciated. Thanks!The Service Corps of Retired Executives collected the data below to see if their small business consulting work in New Orleans changed afte Hurricane Katrina. Their results are summarized in this table. (Academy of Strategic Management Journal, Volume 7, Special Issue, 2008) Before Katrina After Katrina State the null and alternative hypotheses in words. Type of contact Online Telephone 291 12 223 Face to Face 729 346 3 → BIU AAI EX, EE 12pt DELL m 25 Paragraph alt ctriA study is being planned to compare the effects of 2 different exercise protocols on the fine motor control of children with developmental delays. The children from a preschool for special needs childřen are targeted as subjects for this study. There are two classrooms specifically for these children, so each classroom is assigned to one of the 2 protocols. Classroom X gets the usual exercise protocol, while Classroom Y receives the newly designed exercise protocol. A test that includes letter tracing as a measure of fine motor control is administered to the children before and after the 16 weeks of the exercise protocols. What is the most Ilkely threat to internal validity? regression to the mean O selection error O mortality maturation
- A candidate for election made a speech in city A but not in B. A sample of 500 voters from city A showed that 59.6% of the voters were in favour of him, whereas a s ample of 300 voters from city B showed that 50% of the voters favoured him. Discuss whether his speech could produce any effect on voters in city A. Use 5% levelIn a toy shop ,2% of the toys are defective.If a boy selects 4 toys randomly ,find the probabiility of getting atleast one of the toys defective .A research has been conducted to determine the factors affecting the tax return preparation period. Accordingly, Y = b0 + b1x1 + b2x2 + b3x3 + b4x4+ ε model containing 4 independent variables was created. 40 accountants were interviewed and the following results were reached: y = 17,2 + 3,8x1 – 1,04x2 + 2,15x3 + 15,1x4 y : Tax filing preparation time (minutes) x1: Income of individuals ($ 1000) x2: Age of individuals x3: Number of people living in the household x4: 1 if individuals are hosts, 0 if not = 5.3, = 0.13, = 0.33, = 1.51, = 4.7, R2 = 0.45. a) Interpret the estimate ? b) interpret the value of R2 c) Whether the coefficient of ?4 is different from 0, by creating the relevant hypotheses, testing at the level of α = 0.01 significance Please. Interpret the results d) Test the zero hypothesis, expressed as ?1 = ?2 = ?3 = ?4 = 0, at the level of significance α = 0.01. Interpret the results
- A prospective cohort study was conducted to assess the impact of a particular environmental exposure. The investigators enrolled 3000 participants, 1000 who had been exposed and 2000 who had not, and followed them for four years. Ten of the exposed participants and 10 of the unexposed participants were diagnosed with leukemia during the study. The risk of leukemia is: 1) Higher in those that were exposed 2) The same for both groups 3) Higher for those not exposed 4) cannot be determined from the information providedIn many colleges, educators are changing their approach to instruction from a “teacher/lecture-centeredmodel” to a “student-centered model” where students learn in a laboratory environment in which lectureis deemphasized and students can proceed at a pace suitable to their learning needs. In once schoolwhere 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 ofsignificance to test the claim that student-centered model results in a higher pass rate than the traditionalmodel?A national standard requires that public bridges over 20 feet in length must be inspected and rated every 2 years. The rating scale ranges from 0 (poorest rating) to 9 (highest rating). A group of engineers used a probabilistic model to forecast the inspection ratings of all major bridges in a city. For the year 2020, the engineers forecast that 6% of all major bridges in that city will have ratings of 4 or below. Complete parts a and b. a. Use the forecast to find the probability that in a random sample of 7 major bridges in the city, at least 3 will have an inspection rating of 4 or below in 2020. P(x≥3)=
- In the Spring and Summer of 2020, mass protests erupted across the US in response to police violence against African Americans. At the same time, the US was experiencing a COVID-19 pandemic. Many public health experts wondered whether participating in these protests (exposure) would be associated with being diagnosed with COVID-19 (outcome). Imagine you have been hired to draft a plan to study this potential association. Which study design would you choose? (Almost any design is okay). Explain the factors that influenced why you selected that one. Include some of the benefits/drawbacks of your selected study design and the benefits/drawbacks of the study designs you did not select. Write your research question and make a hypothesis about the results. Briefly describe how you would conduct your study, including Recruitment strategy and a number of participants (Be sure you have people in all 4 boxes of the 2x2 table!) Measure of association to be used (RR/OR) Potential confounding…Can higher-order interactions be dropped to error in the analysis of fractional factorial designs? Why or why not ?A company manufacturing CDs is working on a new technology. A random sample of 646 Internet users were asked: "As you may know, some CDs are being manufactured so that you can only make one copy of the CD after you purchase it. Would you buy a CD with this technology, or would you refuse to buy it even if it was one you would normally buy?" Of these users, 59% responded that they would buy the CD. Complete parts a and b below. a) Create a 99% confidence interval for this percentage. ( 54.008 %, 63.993 %) (Round to three decimal places as needed. Use ascending order.) b) If the company wants to cut the margin of error by two thirds, how many users must they survey? The company must survey a total of (Type a whole number.) users
