Correlation Correlation is a statistical technique that can show whether and how strongly pairs of variables are related. For example, height and weight are related; taller people tend to be heavier than shorter people. The relationship isn't perfect. People of the same height vary in weight, and you can easily think of two people you know where the shorter one is heavier than the taller one. Nonetheless, the average weight of people 5'5'' is less than the average weight of people 5'6'', and their
Words: 2622 - Pages: 11
) −1 < x < 1 0 otherwise ∞ f (x) = (a) What is the value of c? We know that for f (x) to be a probability distribution −∞ f (x)dx = 1. We integrate f (x) with respect to x, set the result equal to 1 and solve for c. 1 1 = −1 c(1 − x2 )dx cx − c x3 3 1 −1 = = = = c = Thus, c = 3 4 c c − −c + c− 3 3 2c −2c − 3 3 4c 3 3 4 . (b) What is the cumulative distribution function of X? We want to find F (x). To do that, integrate f (x) from the lower bound of the domain on which f (x)
Words: 4895 - Pages: 20
16. FORMULAS AND TABLES Assets equal liabilities plus equity V = B + S (1.1) Quadratic equation ax2 + bx + c = 0 (1.2) Roots of a quadratic equation x = \r(b2 − 4ac),2a) (1.3) Geometric series, S = a + ax + ax2 + ax3 + ... + axn−1 (1.4) Sum of geometric
Words: 2213 - Pages: 9
Regulated Electricity Utility Industry The electric utility industry generates, transmits and delivers electrical power to consumers, businesses and governments. Today there are three primary business structures in the regulated electrical utility industry—public companies owned by shareholders, municipally owned companies, and those owned and operated by the federal government. Shareholder owned companies are the largest group, providing half of all electricity in the United States. Burning
Words: 1719 - Pages: 7
Data Analysis Problem Three running backs each rushed the ball 19 times in their most recent games. Using the Running Back Data Set (Microsoft Excel), and the three data sets it contains, calculate mean, median, mode, variance, and standard deviation for each running back. Then, write a short paragraph describing the results. Be sure to discuss any unique issues related to data such as outliers, large variance, and so forth. What happens to each running back's results when you eliminate their
Words: 328 - Pages: 2
Macy’s is one of the nation’s premier retailers but a problem has occurred with their inventory of winter apparel. The winter is near and the store knows that an influx of customers will be coming in to purchase winter apparel for their families for the winter season. The manager looked over the inventory and realized that there is a shortage in winter coats again. Macys has a recurring issue in regard to the shortage in inventory because of the department assuming how many coats they would need
Words: 1160 - Pages: 5
CHAPTER 5. EMPIRICAL RESULTS, FINDINGS AND ANALYSIS 1. Over all graphical analysis For any index the best way to gauge its long term movement is to plot its movement over a period of time. So here to start with the analysis part , first the overall movement of the daily “close” data for S&P CNX NIFTY FIFTY is examined for the period starting from 2nd May 2002 till 3rd Feb 2012. There are in total 2347 observations and the econometric package EViews 7 has been used to track the movement
Words: 4836 - Pages: 20
true. Step 2: Determine the Characteristics of the Comparison Distribution In the hypothesis-testing process, you compare the actual sample’s score to this comparison distribution. The comparison distribution is the distribution that represents the population situation if the null hypothesis is true. If the null is true both samples will have a normal curve. Step 3: Determine the Cutoff Sample Score on the Comparison Distribution at Which the Null Hypothesis Should Be Rejected You will need Z
Words: 940 - Pages: 4
Variance Analysis HCA-240 Variance Analysis The many reasons as to why the budget for this month has gone over have many factors involved. For a $5,000 favorable variance on staffing, the department head can state that the company was able to obtain a 25 % discount from a new supplier, which resulted in a savings for the department. Another example would be when you have a $25,000 unfavorable variance in sick time for many employees, the department head would state there was an
Words: 810 - Pages: 4
Will Robots Create Economic Utopia? The Globalization 3.0 that has brought us to the flattening world has intensified. In support of Thomas Friedman every day we have more robotics and automation attributing to the disappearance of middle class and menial jobs. Industries are transforming daily in every industry from customer service to driving trains. This will alter the job market greatly as robots increase and technology changes. Through automation we have high speed trading on Wall Street
Words: 495 - Pages: 2
