Regression analysis.docx

4 Pages

Course Code

This preview shows page 1. Sign up to view the full 4 pages of the document.
Regression analysis fitting a line to the data It would be tempting to try to fit a line to the data we have just analysedproducing an equation that shows the relationship so that we might predict the body weight of mice by measuring their length or viceversa The method for this is called linear regression However this is not strictly valid because linear regression is based on a number of assumptions In particular one of the variables must be fixed experimentally andor precisely measureable So the simple linear regression methods can be used only when we define some experimental variable temperature pH dosage etc and test the response of another variable to it The variable that we fix or choose deliberately is termed the independent variable It is always plotted on the X axis The other variable is termed the dependent variable and is plotted on the Y axis Suppose that we had the following results from an experiment in which we measured the growth of a cell culture as optical density at different pH levels pH Optical density 3 01 4 02 45 025 5 032 55 033 6 035 65 047 7 049 75 053 We plot these results see below and they suggest a straightline relationship httparchivebioedacukjdeaconstatisticstress11htmlRegression analysis Perfect for first years
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.