4. This question pertains to the article, “On the Optimality of Line Call Challenges inProfessional Tennis," by Abramitzky et al. (2012). Use the table below to answer (i)-(ii).(i) Explain why the difference in match win probabilities is significant.(ii) Explain why the number of challenges remaining in the set is significant.(iii) On what basis did the authors conclude that players challenge too few calls? 100 if Challenge Won, O if Lost(1)(2)Dependent Variable(3)ImportanceDifference in match win probabilitiesb-0.630*** -–0.531***-0.550**(0.163)(0.195)(0.240)Option valueChallenges remaining in the set-4.729*-4.819*-14.813***(2.997)(2.465)(2.434)Expected number of points left in setb0.177***0.141*0.075(0.125)(0.060)(0.079)Additional controlsMatch fixed-effects (479 unique matches)noyesyesnoyes1,973noNumber of observations2,0081,9730.024R-squared0.0130.032

4 i. The number of observations in model 1 are more compared with model 2 and model 3. And, the…

Answered: 4. This question pertains to the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Whenever a two-factor experiment results in a significant interaction, you should be cautious about interpreting the main effects because an interaction can distort, conceal, or exaggerate the main effects of the individual factors. True False
3
To test the fairness of law enforcement in its area, a local citizens’ group wants to know whether women and men are unequally likely to get speeding tickets. Four hundred randomly selected adults were phoned and asked whether or not they had been cited for speeding in the last year. Using the results in the following table and a 0.02 level of significance, test the claim of the citizens’ group. Let men be Population 1 and let women be Population 2. Speeding Tickets Ticketed Not Ticketed Men 28 152 Women 20 200 Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. H0: p1=p2 Ha: p1__p2 Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places Step 3 of 3: Draw a conclusion and interpret the decision.
In a recent study, Piff, Kraus, Côté, Cheng, and Keltner (2010) found that people from lower socioeconomic classes tend to display greater prosocial behavior than their higher-class counterparts. In one part of the study, participants played a game with an anonymous partner. Part of the game involved sharing points with the partner. The lower economic class participants were significantly more generous with their points compared with the upper-class individuals. Results similar to those found in the study, show that n = 12 lower-class participants shared an average of M = 5.2 points with SS = 11.91, compared to an average of M = 4.3 with SS = 9.21 for the n= 12 upper-class participants. a. Are the data sufficient to conclude that there is a significant mean difference between the two economic populations? Use a two-tailed test with a = .05. b. Construct an 80% confidence interval to estimate the size of the population mean difference. *** INCLUDE 5 STEPS TO ANSWER A
Two different areas of large eastern city are being considered as sites for day care centers. Of 200 households surveyed in one section, the proportion in which the mother worked full time was 0.52. In another section, 40 % of the 150 households surveyed had mothers working at full time jobs. At the 0.04 level of significance, is there a significant difference in the proportions of working mothers in the two areas of the city? A coal fired power plant is considering two different systems for pollution abatement .The first system has reduced the emission of the pollutants to acceptable levels 68 percent of the time, as determined from 200 air samples. The second, more expensive system has reduced the emission of pollutants to acceptable levels 76 percent of the time, as determined from 250 air samples. If the expensive system is significantly more effective than the inexpensive system in reducing pollutants to acceptable levels, then the management of the power plant will install the…
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3. Suppose that you are designing a study for your dissertation and you wish to compare a new curriculum with a standard curriculum on a relevant performance outcome. You inquire about data collection from different sites, and find that you have two options: Option A: you can obtain 50 observations from the "standard" curriculum group and 30 observations from the new curriculum group, and using these groups you would expect to see a difference of 10 points between the group means with a (pooled) standard deviation of 20. Option B: you can obtain 50 observations from the "standard" curriculum group and 40 observations from the new curriculum group, and using these groups you would expect to see a difference of 8 points between the group means with a (pooled) standard deviation of 20. Your advisor tends to think that you should go with Option B because it will provide a larger sample size and thus you will be more likely to reject Ho. Do you agree with your advisor that option B will…
The article “Valuing Watershed Quality Improvements Using Conjoint Analysis” (S. Farber and B. Griner, Ecological Economics, 2000:63–76) presents the results of a mail survey designed to assess opinions on the value of improvement efforts in an acid-mine degraded watershed in Western Pennsylvania. Of the 510 respondents to the survey, 347 were male. Census data show that 48% of the target population is male. Can you conclude that the survey method employed in this study tends to oversample males? Explain.

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