Class Notes (808,862)
Canada (493,417)
Chemistry (133)
CHEM 212 (12)
Lecture 4

CHEM 212 Lecture 4: Sept. 14/2016

2 Pages
Unlock Document

University of Victoria
CHEM 212
Hamilton M.Coreen

Chem 212 Lecture 4 Sept. 14/2016 How to use stats controls on calculator: stats mode 2nd function mode M+ for adding data points RCL then xbar and sx clear= 2nd function CA Describing the variation in large data sets: -make the same measurement many time... aka replicates -Plot the data from measurements you will get normal Gaussian distribution -+/- 1SD 68% within 1 std. dev of the mean -16% on either side, tails -+/- 2 area is 95.4% within mean -problem resulting 2 std. dev reports larger range thus less value in number -95% area is within 2 -99% area is within 3 -If the data set is large then the data set describes the population -the average is mu -std. dev is sigma -If data set is small then data describes a sample -the average is xbar -std. dev is s * we use xbar and s to predict mu and sigma -Systematic error does not change to shape of the curve it changes the position along the x-axis -Effect of change in Precision, Std. dev changes but the mean does not change -confidence interval affected -mu and sigma are the true values for the population -the larger the n, the better the sample estimates the population -We will measure replicates, calculate xbar and s and use known characteristics of Gaussian distributions to make conclusions about our data -We assume that analy
More Less

Related notes for CHEM 212

Log In


Don't have an account?

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.