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- all spanish words are translated here Hoping to attract more commuters, an urban transportation company plans to run express bus service from a suburban terminal to the city's financial center. These buses should save travel time. The city decides to carry out a study of the effect of four different plans (for example a special lane and synchronized traffic lights) on the travel time of buses. Travel times (in minutes) are measured for multiple business days during peak hour travel when each of the plans is being implemented. The results appear in the table below. Anova: Single Factor The sum of the square of the errors is:Several states have argued that the 65-mph speed limit has no justification and have refused to enforce it. The federal Department of Transportation (DOT) believes that the 65-mph limit saves lives. To illustrate its contention, the department regressed the number of traffic fatalities (Y) last year in a state on the state’s population (X1), the number of days of snow cover (X2), and the average speed of all cars (X3). The results are shown below. Table 10: Model Summary Model R R Square Adjusted R Square Std. Error of the Estimate 1 .821 a .780 .613 3.258 a. Predictors: (Constant), population, days of snow, average speed Table 11: Coefficients Coefficientsa Model Unstandardized Coefficients Standardized Coefficients t Sig. B Std. Error Beta 1 (Constant) 1.4 2.957 .473 .584 Population .00029 .00003 .0034 9.667 .000 Days of Snow 2.4 .62 .759 3.871 .000 Average Speed 10.3 1.1…A psychologist is interested in how men and women react toward mental health counseling. She asked 60 men and 90 women whether they would consider using mental health services should they think they might need them. The choices were no, maybe, and yes. The following table lists the answers for the men and women in the form of a 2 x 3 contingency table. Using a chi-square analysis answer the question: Is there a relationship between men and women's willingness to use mental health counseling services? Use alpha = .05 No Maybe Yes Males 17 32 11 Females 13 43 34 df= Critical value of 2 = Calculated value of 2 = Calculated p Conclusion: State your results as if you are writing it in an APA paper
- A local school district would like to implement a reading intervention to help students who are struggling with their reading skills. The school gives all of their 2nd grade students a reading test. They split the students into a high-performing and low-performing group based on the scores. The high-performing group is taught via the traditional method. The low-performing group is taught with the special intervention method. The two groups are re-tested after eight weeks. The school found that the low-performing group improved drastically, while the high-performing group did worse. The school district concludes the intervention works. Based on the story above, address the following: Does the school district have definitive evidence that the reading intervention works? How might the results be related to the concept of regression towards the mean? What suggestions would you make to the school district if they wanted to mitigate the regression towards the mean effect?Use the data and develop a model to predict Overall Satisfaction. R2 is over 0.70 so we can use this model. Group of answer choices True False Brokerage Satisfaction with Trade Price Satisfaction with Speed of Execution Overall Satisfaction with Electronic Trades Scottrade, Inc. 3.4 3.4 3.5 Charles Schwab 3.2 3.3 3.4 Fidelity Brokerage Services 3.1 3.4 3.9 TD Ameritrade 2.9 3.6 3.7 E*Trade Financial 2.9 3.2 2.9 (Not listed) 2.1 3.2 2.7 Vanguard Brokerage Services 2.0 3.8 2.8 USAA Brokerage Services 2.1 3.8 3.6 Thinkorswim 1.9 2.6 2.6 Wells Fargo Investments 2.2 2.7 2.3 Interactive Brokers 3.1 4.0 4.0 Zecco.com 2.5 2.5 2.5 Firstrade Securities 3.0 3.0 4.0 Banc of America Investment Services 4.0 1.0 2.0a) An experimenter, Mr Mafanela would like to investigate the effects of a treatment with five levels A, B, C, D, and E. However he could only afford to take twenty observations in five blocks which could only be of size four each. (i) Sketch the layout of the data. (ii) Check whether Mr Mafanela design is balanced or not.
- A researcher replicates a past study manipulating the physical attractiveness of a defendant by using photographs instead of written descriptions, which was how the manipulation occurred in the original study. This technique would be an example of _____ replication. a. direct b. exact c. conceptual d. proceduralOne of the most impressive, innovative advances in online fundraising over the past decade is the rise of crowd-funding websites. While features differ from site to site, crowd-funding sites are websites that allow you to set up an online fundraising campaign based around a fundraising page, and accept money directly from that page using the website's own credit card processor. A certain crowd-funding website reported that 132 of 358 technology crowd-funding projects were successfully launched in the past year and 353 of 889 film and video crowd-funding projects were successfully launched in the past year. Calculate the test statistic and p-value.The basketball coach at a local college believes that his team scores more points at home games when more people show up. Below is a list of all home games last year with scores and corresponding attendance. Use Excel, SPSS, or work by hand to show your work finding r. Show your work on the attached pages. Score Attendance Score Attendance 54 380 67 410 57 350 78 215 59 320 67 113 80 478 56 250 82 451 85 450 75 250 101 489 73 489 99 472 53 451 g. What is the coefficient of determination for this relationship? h. Interpret for these two variables presuming a causal relationship was expected.
- The basketball coach at a local college believes that his team scores more points at home games when more people show up. Below is a list of all home games last year with scores and corresponding attendance. Use Excel, SPSS, or work by hand to show your work finding r. Show your work on the attached pages. Score Attendance Score Attendance 54 380 67 410 57 350 78 215 59 320 67 113 80 478 56 250 82 451 85 450 75 250 101 489 73 489 99 472 53 451 a. What is the correlation between Score and Attendance rounded to 2 decimals? b. In terms of strength and direction, how would you describe this correlation? c. What is the obtained t-score for this correlation? d. What is the critical t-score for a two-tailed test with a ? e. Is this correlation significant based on the t-scores? f. Based on Table 10.4, approximately how many cases would you expect to need to…The basketball coach at a local college believes that his team scores more points at home games when more people show up. Below is a list of all home games last year with scores and corresponding attendance. Use Excel, SPSS, or work by hand to show your work finding r. Show your work on the attached pages. Score Attendance Score Attendance 54 380 67 410 57 350 78 215 59 320 67 113 80 478 56 250 82 451 85 450 75 250 101 489 73 489 99 472 53 451 What is the obtained t-score for this correlation? What is the critical t-score for a two-tailed test with a = 0.05? Is this correlation significant based on the t-scores?A researcher wants to explore the differences in health effects from two different types of sugar. She hypothesizes that artificial sweetener has lower long term health benefits than natural sugar. What is her null hypothesis? Fill in the blank. H0: μArtificalSweetener__________ μNaturalSugar Group of answer choices a) Less than b) Less than or equal to c) Greater than d) Greater than or equal to