Free Essays on Actuation to Get Inspired & Learn by Example

Assignment 5: Checking Statistical Assumptions

The mtcars dataset included in R contains information extracted from the 1974 Motor Trend US magazine, and contains 32 observations of different vehicles (1973-74 models) regarding their fuel consumption data and other 10 car aspects. For this assignment, a multiple linear regression model was built to predict mpg (miles per gallon of fuel), based on cyl (number of cylinders), hp (gross horsepower), wt (weight of the vehicle in lb/1000), qsec (1/4 mile time) and am (transmission: automatic or manual). The predictors were chosen based on an educated guess.

In order to make a diagnosis of this model, several plots Continue reading...

Modern world if full of people who come from different backgrounds and from different cultures and the term minorities started to appear more often. Minorities plays a significant role in the economy of United States, and the number of businesses owned by minorities keeps growing every year. Thus, the statistics shows that the number of businesses owned by minorities grew by 46%, in the period from 2002 until 2007. This number represents a rapid growth, especially in comparison to the 10% growth of nonminority owned businesses (Ordonez, 2014). In such a way, minorities own approximately 15% of businesses in Continue reading...