Linear and Quadratic Regression

Curve Fitting: Linear or Quadratic? Ellen and Kelly break down Ellens new car in an empty space lot. They mark a braking line where Ellen applies the brakes. Kelly them measures the distance from that line to the sit where Ellen stops. Below is the relationship of their speed and stopping distance. Speed (mi/h)| 5| 10| 15| 20| 25| Stopping master (ft)| 7| 17| 30| 46| 65| A linear reasoning backward shows the relation in a chase away plot of data. The relapsing is represented by a peachy line entered to the graph to show how operose the coefficient of correlation coefficient is. A quadratic polynomial reverting is a parabola that shows the relation between data on a divide plot, to show how strong the correlation is. To find out whether a linear regression or a quadratic regression organized the data more than accurately I reckon each regression on my calculator and looked at which correlation coefficient was stronger. To find the linear regression I used my calculator and went to stat and typed in the data consequently went to Stat Calc - LinReg(ax+b) Calc. It gave me the formula for the data on the scatter plot. Y = 2.9x + 10.5 and the correlation coefficient is .9925. This means the correlation is real strong since it is close to 1. The nestled the correlation coefficient is to 1 or -1 the stronger it is.

To find the quadratic regression I went to Stat Calc QuadReg Calc. The formula was y = .06x + 1.1 and the correlation coefficient was 1. This means the quadratic regression fits the data perfectly. utilize the information that I collect between t he two regressions, quadratic regression is ! the best answer. (EXCEL) An causa of a job or career that requires linear and quadratic regressions is an Actuary. They use data to reckon trends for insurance companies. Such as how long people innate(p) in a reliable year, or in a particular region, would be judge to live, or how many profession accidents they get out have, or what it will cost them for health care during their lifetime. These...If you want to get a beneficial essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper