Class Notes (835,342)
Canada (509,116)
Statistics (248)
STAT151 (157)
Lecture

STAT 151 (09/18/13) Chapter 6 & 7

3 Pages
84 Views
Unlock Document

Department
Statistics
Course
STAT151
Professor
Paul Cartledge
Semester
Fall

Description
STAT 151 (September 18, 2013) Chapter 6 and 7 Review of the Empirical Rule 1. 68% of the observations lie within one standard deviation from the mean (on either sides) 2. 95% of the observations lie within two standard deviations from the mean (on either sides) 3. 99.7% of the observations lie within three standard deviations from the mean (on either side) *** Fun Fact: If you go 5 standard deviations from the mean on either side, then the amount of observations included are 99.99994% (far less chance of error) ***  The z-score tells us how many standard deviations an observation is from the mean… it is NOT a probability (despite its appearance) Chapter 7: Scatterplots, Association, and Correlation  Now, it is all about bivariates Bivariate data – data where two numerical variables are related Possible terminology: In this case, ‘y’ is ALWAYS predicting ‘x’.  When using bivariate data, which one is which DOES matter because one variable is predicted based on the other! Association – something that exists between two variables if they are related such that a variable value is more LIKELY to occur with certain value(s) of the other. (this is DIFFERENT from correlation!!)  A scatterplot is used to graph the two corresponding numerical values (one will be along the x-axis and the other wi
More Less

Related notes for STAT151

Log In


OR

Join OneClass

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

Sign up

Join to view


OR

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.


Submit