1. Following the explosion of the 25th space shuttle flight‚ which was caused by an O-ring failure in one or more of the booster rockets‚ data from the previous 24 flights were studied. The Temperature (F) at the time of launch and whether or not there was evidence of O-ring failures for each of the previous 24 shuttle flights was determined for each flight. A logistic regression relating the Failure of O-rings to the Temperature was obtained with the following result: Estimate Std. Error z value Intercept
Premium Regression analysis
Chapters 1-3:In order to control costs‚ a company wishes to study the amount of money its sales force spends entertaining clients. The following is a random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by members of the sales force. $157‚ $132‚ $109‚ $145‚ $125‚ $139. Calculate the mean and sample variance(s^2) and standard deviation. Mean = 807/6 = 134.5. Sample Variance = (109925 – (807^2/6)/6-1 = (109925 – 108541)/5 = 1384/5 = 276.8.
Free Random variable Standard deviation Normal distribution
Working Paper 05-47 Statistics and Econometrics Series 09 July 2005 Departamento de Estadística Universidad Carlos III de Madrid Calle Madrid‚ 126 28903 Getafe (Spain) Fax (34) 91 624-98-49 BAYESIAN INFERENCE FOR THE HALF-NORMAL AND HALF-T DISTRIBUTIONS M.P. Wiper‚ F.J. Girón‚ A. Pewsey* Abstract In this article we consider approaches to Bayesian inference for the half-normal and half-t distributions. We show that a generalized version of the normal- gamma distribution is conjugate to the
Premium Normal distribution
Exam Notes: Chapter 1: Gerontology: study of aging form maturity through old age Agism: a form of discrimination against older adults based on their age Life-span perspective: Divides human development into two stages- Early phase: (childhood and adolescence) rapid age-related increases in peoples size and abilities Later phase: (young adulthood‚ middle age‚ and old age) change are slow‚ but abilities to continue to develop as people continue adapting to the environment. 4 key features:
Free Gerontology Old age Middle age
Survival in Brazil Sociology on Campus: A Culture of Cheating? 50 At a fairground in Iran‚ a girl enjoys a Spiderman ride. Shared learned behavior—what we call culture—can move across international borders to become part of foreign societies Culture 3 51 Poorer families imitate the rich by applying pottery plaques to their shrine walls. While each family has at least one such shrine‚ the rituals associated with it are not family ceremonies but are private and secret. The rites are normally only
Free Culture
Measure of Happiness Authentic happiness‚ has a different definition for every single individual. It falls in a different place of state for all of us‚ yet happiness is the predominant reason us as humans do any one thing. We do different activities that are all motivated by the same quest of finding happiness. You may think that ‘happiness’ is just falls into one thing‚ but in the self help novel Stumbling on Happiness by Daniel Gilbert states that happiness has three different categories. There
Premium Emotion Happiness
increase by 0.0953 billion dollars (c) Comment on the significance of model (α = 0.05) Hypotheses: H0: β1 =0 H1 : β1 ≠ 0 Decision rule: reject H0‚ if |tcalc|> |t(α/2‚ n-k-1)| Where tcrit = t (0.025‚ 98) =1.9845 Test statistic: t = = = 48.368 Decision: Reject H0 because t calc > t crit Conclusion: There is sufficient evidence to conclude that there is significant relationship between disposable personal income and PCE at 5% level of significance. (d) The
Premium Regression analysis
Lind Chapter 3: Exercise 60 Owens Orchards sells apples in a large bag by weight. A sample of seven bags contained the following numbers of apples: 23‚19‚26‚17‚21‚24‚22. a. Compute the mean number and median number of apples in a bag. Total number of Problems = 11 Mean = (23+19+26+17+21+24+22)/7 = 21.71 Problems correct = 8 Median = 22 CORRECT List of # in order from low to high: 17‚19‚21‚22‚23‚24‚26 List of # in order from high
Premium Harshad number English-language films The Profit
Summary – Chapter 3 starts with Jack alone in the woods hunting for pigs. Even though he tries really hard he fails to kill a pig‚ so he decides to go back where Ralph and Simon are trying to build shelters. Once he gets back him and Ralph get into a fight over what is more important killing a pig or building a shelter but Simon interrupts them and says that some of the kids still believe in the beastie. Instead of worrying about the beastie‚ Jack starts to talk about how they should paint their
Premium
Homework Chapter 3 (2‚ 6‚ 7‚ 8‚ 9 ‚11‚ 12‚ 13‚ 14‚ 16) 3-2 Develop your own model of the steps in the planning process. First‚ planning process is a set of steps and strategies to achieve a goal or an aim. The planning process may consist of a missions and visions to help in achieving the objectives that must be identified in an earlier stage. Steps that are required in the planning process include: 1. Start with addressing the mission of this project. 2. Create alternatives ways to archive
Premium Management Ford Motor Company