2. Describe the steps involved in ARMA model selection (focus mainly on model identification and diagnostic checking).
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2. Describe the steps involved in ARMA model selection (focus mainly on model identification and
diagnostic checking).
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- Of the 30 newly accepted juveniles into juvenile hall, half were placed in the regular program and half were placed in the vitamin and supplements program. After 12 months researchers documented the number of infractions that occurred for each of the 30 students and wanted to assess if the program worked. Group 1 (average infractions per month)• 3.2 1 0 4.7 5.3 2 1.6 4 2.8 7 4 3.1 5.7 0 1.8 Group 2 -Vitamins (average infractions per month) 0 5.2 1.2 2.1 3 1.7 0 2.9 .7 4.3 3.1 1.4 2 .9 2.6 Construct an independent samples t-test either by hand or using spss. (Be sure to interpret)Of the 30 newly accepted juveniles into juvenile hall, half were placed in the regular program and half were placed in the vitamin and supplements program. After 12 months researchers documented the number of infractions that occurred for each of the 30 students and wanted to assess if the program worked. Group 1 (average infractions per month)• 3.2 1 0 4.7 5.3 2 1.6 4 2.8 7 4 3.1 5.7 0 1.8 Group 2 -Vitamins (average infractions per month) 0 5.2 1.2 2.1 3 1.7 0 2.9 .7 4.3 3.1 1.4 2 .9 2.6 Construct an independent samples t-test by hand. (Be sure to interpret)The Bureau of Labor Statistics gathers data about employment in the United States. A sample is taken to calculate the number of U.S. citizens working in one of several industry sectors over time. Table 11.16 shows the results: Industry Sector 2000 2010 2020 TotalNonagriculture wage and salary 13,243 13,044 15,018 41,305Goods-producing, excluding agriculture 2,457 1,771 1,950 6,178Services-providing 10,786 11,273 13,068 35,127Agriculture, forestry, fishing, and hunting 240 214 201 655Nonagriculture self-employed and unpaid family worker 931 894 972 2,797Secondary wage and salary jobs in agriculture and private householdindustries 14 11 11 36Secondary jobs as a self-employed or unpaid family worker 196 144 152 492Total 27,867 27,351 31,372 86,590 Table 11.16 We want to know if the change in the number of jobs is independent of the change in years. State the null and alternative hypotheses and the degrees of freedom.
- How many main effects and interaction effects are possible in a 2 × 6 factorial design? No other details given. Statics and reacherce questionsFrom the Research Question below please provide a list of semi-structured questions to be used in conducting an questionnaire. What are the perceptions of public servants of the recruitment, selection and retention policies and practices in the public service of Monserrat?In the book Business Research Methods (5th ed.), Donald R. Cooper and C. William Emory discuss studying the relationship between on-the-job accidents and smoking. Cooper and Emory describe the study as follows: Suppose a manager implementing a smoke-free workplace policy is interested in whether smoking affects worker accidents. Since the company has complete reports of on-the-job accidents, she draws a sample of names of workers who were involved in accidents during the last year. A similar sample from among workers who had no reported accidents in the last year is drawn. She interviews members of both groups to determine if they are smokers or not. The sample results are given in the following table. On-the-Job Accident Smoker Yes No Row Total Heavy 12 5 17 Moderate 9 10 19 Nonsmoker 13 17 30 Column total 34 32 66 Expected counts are below observed counts Accident No Accident Total Heavy 12 5 17 8.76 8.24…
- The business objective of the director of Game Ghana is to forecast monthly sales for all new stores, based on the number of profiled customers who live no more than 30 minutes from a Game store. To examine the relationship between the number of profiled customers who live within a fixed radius from a Game store and it monthly sales, data were collected from a sample of 10 stores:Store 1 2 3 4 5 6 7 8 9 10No of customers (‘000)5728432453 Monthly Sales (‘000)81261487910128(a) Use the least-squares method to compute the regression coefficients ? ??? ?(b) Write down the estimated equation and predict the monthly sales if there are 9000 customers(c) Determine the coefficient of determination, r2 and explain its meaning in this problem(d) Determine the value of the extent of relationship between monthly sales and number of customers, and interpret your results.As part of a study on transportation safety, the U.S. Department of Transportation collected data on the number of fatal accidents per 1,000 licenses and the percentage of licensed drivers under the age of 21 in a sample of 42 cities. Prepare a managerial report that analyzes the data. Consider the complete data set collected over a one-year period. Safety Percent Under 21 Fatal Accidents per 1000 12 2.942 11 0.688 7 0.865 11 1.632 10 2.071 16 2.607 17 3.81 7 0.348 12 1.122 7 0.625 8 1.008 15 2.781 11 1.385 8 1.413 9 0.019 8 0.318 10 1.829 11 2.226 13 2.835 13 2.332 10 1.274 16 4.08 7 2.17 15 3.603 14 2.603 8 0.815 7 0.8 13 2.87 7 1.247 14 3.204 9 0.994 9 0.473 13 1.423 17 3.594 9 1.906 13 1.623 15 2.923 11 1.893 14 2.794 12 2.614 8 0.906 16 3.236 Find the mean and standard deviation of licensed drivers under the age of 21. (Round your answers to two decimal places.) MeanStandard deviation Find…
