The level of significance is 0.05. In the regression model, which of the following are dummy variables?
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- How Panel Data is useful to control some types of omitted variables without actually oberving them?Researchers conducted a study on using a chief executive officer's facial structure to predict a firm's financial performance. The facial width-to-height ratio (WHR) for each in a sample of 53 CEOs at publicly traded firms was determined. The sample resulted in x= 1.94 and s = 0.15. An analyst wants to predict the financial performance of a firm based on the value of the true mean facial WHR of CEOs. The analyst wants to use the value of u = 2.2. Do you recommend he use this value? Conduct a test of hypothesis for u to help you answer the question. Specify all the elements of the test, including Ho, Ha, test statistic, p-value, and your conclusion. Test at a = 0.05.Identify the type of table that is used to group bivariate data.
- A marketing researcher wants to estimate the mean savings ($) reallzed by shoppers who showroom. Showrooming is the practice of inspecting products in retail stores and then purchasing the products online at a lower price. A random sample of 100 shoppers who recently purchased a consumer electronics Item online after making a visit to a retail store ylelded a mean savings of $58 and a standard devlation of $55. Is there evidence that the population mean savings for all showroomers who purchased a consumer electronics item is different from $50 at a 5% level of significance? Step 1: The null hypothesis is Ho: 1. H-$50 v Step 1: The alternative hypothesis Is H: 2. 2 $50 Step 2: The value of the test statistics is 3. ps $50 Step 3: The lower critical value is Note: If thero is one critical value, one of the "lower critlcal value" or "upper .critical value" should be none". 4. H# $50 Step 3: The upper critical value is Note: If there is one critical value, one of the "lower critical value"…A psychology student conducted a study on using a chief executive officer's facial structure to predict a firm's financial performance. The facial width-to-height ratio (WHR) for each in a sample of 60 CEOS at publicly traded firms was determined. The sample resulted in x = 2.06 and s = 0.40. The student wants to predict the financial performance of a firm based on the value of the true mean facial WHR of CEOS. The student wants to use the value of u = 2.2. Do you recommend he use this value? Conduct a test of hypothesis for u to help you answer the question. Specify all the elements of the test, including Ho, Ha, test statistic, p-value, and your %3D conclusion. Test at a = 0.01. What are the null and alternative hypotheses? A. Ho: Ho + 2.2 В. Но: Но 3D2.2 Hạ: Ho = 2.2 Ha: Ho # 2.2 O C. Ho: Ho s2.2 Ha: Ho > 2.2 D. Ho: Ho 2 2.2 Ha: Ho <2 What is the value of the test statistic? (Round to two decimal places as needed.) Find the p-value. p-value (Round to three decimal places as needed.)…A psychology student conducted a study on using a chief executive officer's facial structure to predict a firm's financial performance. The facial width-to-height ratio (WHR) for each in a sample of 55 CEOs at publicly traded firms was determined. The sample resulted in x=1.74 and s=2.02. The student wants to predict the financial performance of a firm based on the value of the true mean facial WHR of CEOs. The student wants to use the value of μ=2.3. Do you recommend he use this value? Conduct a test of hypothesis for μ to help you answer the question. Specify all the elements of the test, including H0, Ha, test statistic, p-value, and your conclusion. Test at α=0.10. Find the p-value. p-value=enter your response here (
- Calculate coefficient of variation from the following data: 25, 27, 30, 32, 32, 40, 45, 46, 47, 48true or false MSBetween represents the variability that is only affected by unsystematic factors.The R&D department of a paint company has developed an additive that it hopes will increase the ability of the company's stain for outdoor decks to resist water absorption. The current formulation of the stain has a mean absorption rate of 35 units. Before changing the stain, a study was designed to evaluate whether the mean absorption rate of the stain with the additive was decreased from the current rate of 35 units. The stain with the additive was applied to 50 pieces of decking material. The resulting data were summarized to j = 33.6 and s = 9.2. a. Is there substantial evidence (a = 0.01) that the additive reduces the mean absorption from its current value?
- The Management Department recently purchased a smallcopier for faculty use. Although the workload of the office staff has improved somewhat, the secretaries are still mak-ing too many trips to the Dean’s office when the depart-mental copier is out of service. Sylvia, the departmental secretary, has been keeping track of failure rates and ser-vice times. With a mean time between failures of 100 hours and a mean time to repair of 24 hours, how much of thetime is the new copier available for faculty use?What are the best measures used used for data variation or dispersionwhat are the four imporatant sources of data?