Class Notes (835,929)
Canada (509,507)
York University (35,286)
Biology (2,238)
BIOL 2060 (95)

chap 3 textbook.docx

2 Pages
Unlock Document

BIOL 2060
Joel Shore

Describing Data - Descriptive stats/summary stats: quantities that capture important features of frequency distributions - Most important are: location of frequency dist. And the spread. - Most important is the proportion: fraction of observations in a given category 3.1 Arithmetic mean and standard deviation - Mean is the most common metric to describe location of a freq. Dist. - Standard deviation is most used to measure dist. Of spread. - SAMPLE MEAN=average, line over Y ...ybar - Standard deviation: measures how far from the mean the observations typically are. ->calculated from the variance, square of the variance first take your value and subtract the mean from it, then square it. Add all those numbers together (sum of squares) then divide by one less than the total amount of observations, then square root it - Round to one decimal place bigger than your biggest decimal value in the numbers - Coefficient of variation (CV): calculates the standard deviation as a percentage of the mean 1
More Less

Related notes for BIOL 2060

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.