tailieunhanh - Ebook Business statistics (2nd edition): Part 2

(BQ) Part 2 book "Business statistics" has contents: Inference for regression, understanding residuals, multiple regression, building multiple regression models, time series analysis. | Inference for Counts: Chi-Square Tests SAC Capital Hedge funds, like mutual funds and pension funds, pool investors’ money in an attempt to make profits. Unlike these other funds, however, hedge funds are not required to register with the . Securities and Exchange Commission (SEC) because they issue securities in “private offerings” only to “qualified investors” (investors with either $1 million in assets or annual income of at least $200,000). Hedge funds don’t necessarily “hedge” their investments against market moves. But typically these funds use multiple, often complex, strategies to exploit inefficiencies in the market. For these reasons, hedge fund managers have the reputation for being obsessive traders. One of the most successful hedge funds is SAC Capital, which was founded by Steven (Stevie) A. Cohen in 1992 with nine employees and $25 million in assets under management (AUM). SAC Capital returned annual gains of 40% or more through much of the 1990s and is now reported to have more than 800 employees and nearly 449 450 CHAPTER 15 • Inference for Counts: Chi-Square Tests $14 billion in assets under management. According to Forbes, Cohen’s $ billion fortune ranks him as the 36th wealthiest American. Cohen, a legendary figure on Wall Street, is known for taking advantage of any information he can find and for turning that information into profit. SAC Capital is one of the most active trading organizations in the world. According to Business Week (7/21/2003), Cohen’s firm “routinely accounts for as much as 3% of the NYSE’s average daily trading, plus up to 1% of the NASDAQ’s—a total of at least 20 million shares a day.” I n a business as competitive as hedge fund management, information is gold. Being the first to have information and knowing how to act on it can mean the difference between success and failure. Hedge fund managers look for small advantages everywhere, hoping to exploit inefficiencies in the market and to turn those .

• Kinh tế học
• Business statistics
• Inference for regression
• Understanding residuals
• Multiple regression
• Building multiple regression models
• Time series analysis
• Lecture Business statistics
• Bài giảng Thống kê doanh nghiệp
• Descriptive statistics tabular
• Descriptive statistics graphical presentations
• Summarizing quantitative data
• Essentials of modern business statistics
• Modern business statistics
• Descriptive statistics
• Graphical presentations
• numerical measures
• Exploratory data analysis
• Interval estimation
• Hypothesis tests
• Simple linear regression
• Basic statistics
• Statistics for business
• Describing data
• Types of statistics
• Quantitative variables
• Ordinal level data
• Business statistics in practice
• Data sources
• Statistical inference
• Illustrate sampling
• Graphical methods
• Tabular methods
• Graphically summarizing qualitative data
• Numerical methods
• Describing central tendency
• Measures of variation
• Sample spaces
• Elementary probability rules
• Compute conditional probabilities
• Discrete random variables
• Discrete probability distributions
• Binomial distribution
• Continuous random variables
• Continuous probability distributions
• Uniform distribution
• Sampling distributions
• Random sampling
• Stratified random
• Confidence intervals
• Sample size determination
• Hypothesis testing
• Alternative hypotheses
• Sampling distribution
• Equal variance
• Statistical inferences
• Population variances
• Experimental design
• Analysis of variance
• Randomized block design
• Chi square tests
• Chi square goodness of fit tests
• Multinomial experiment
• Simple linear regression analysis
• Simple linear regression model
• Model assumptions
• Least squares point estimate
• Multiple regression model
• Times series forecasting
• Index numbers
• Forecast error comparisons
• Statistical process control
• Causes of variation
• Control charts
• Nonparametric methods
• Hypothesis test
• Decision theory
• Utility theory
• Posterior probabilities